Selfishness is the main issue, and Homosexuality is only one of many branches of the core issue.
The Family is the fundamental unit of society, and that has been broken and eroded quite a bit in the last 100 years. Selfishness is the main reason there is so much discord in a family, it is the main reason children will not talk to parents or parents will not talk to children. It is the main reason for divorce. It is the main reason for cheating among spouses, or sexual relations before marriage. More and more children have been raised in an atmosphere farther and farther from that of a loving and nurturing home with a father and a mother present that love them and love each other.
Homosexuality has no place in a family, its nature runs a course opposite to that of which a family could be created or formed. If two men or two women were the last two people on the earth they could not procreate. They would be the last two people on earth, period. As to religion, one of the purposes of life is to procreate and be part of the “creation” of life. As to science it has been said that one of the first “instincts” is to pass your genes on. Homosexuality plays no useful role in either religious ideas, or scientifically the passing on of genes, but is mainly a selfish act of those involved. At best homosexual intercourse form a bond between those participating. Heterosexual intercourse can be a selfish act, it can form a bond between two people, and it can form an even more beautiful bond between those people through the formation of new life.
Some info and statistics about homosexuality:
Dr. Neil Whitehead and Briar Whitehead state regarding various cultures: "If homosexuality were significantly influenced by genes, it would appear in every culture, but in twenty-nine of seventy-nine cultures surveyed by Ford and Beach in 1952, homosexuality was rare or absent."
https://www.mygenes.co.nz/download.htm
Dr. Tahir I. Jaz, M.D., Winnipeg, Canada states: "The increasing claims of being "born that way" parallels the rising political activism of homosexual organisations, who politicise the issue of homosexual origins . In the 1970s, approximately ten percent of homosexuals claimed to be "born homosexual" according to a large scale survey....However, in a survey in the 1980s, with the homosexual rights movement increasingly becoming active, thirty-five percent claimed to be born that way.
https://www.flyfishingdevon.co.uk/salmon/year2/hormones/tahir.htm
Risks of the homosexual lifestyle to children
Finally, research has demonstrated considerable risks to children exposed to the homosexual lifestyle. Violence between homosexual partners is two to three times more common than among married heterosexual couples.25,26,27,28,29 Homosexual partnerships are significantly more prone to dissolution than heterosexual marriages with the average homosexual relationship lasting only two to three years.30,31,32,33 Homosexual men and women are reported to be promiscuous, with serial sex partners, even within what are loosely-termed "committed relationships.34,35,36,37,38 Individuals who practice a homosexual lifestyle are more likely than heterosexuals to experience mental illness,39,40,41 substance abuse,42 suicidal tendencies43,44 and shortened life spans.45 Although some would claim that these dysfunctions are a result of societal pressures in America, the same dysfunctions exist at inordinately high levels among homosexuals in cultures where the practice is more widely accepted.46
https://www.acpeds.org/Homosexual-Parenting-Is-It-Time-For-Change.html
Regarding Homosexuality and health, of newly diagnosed HIV infections in the United States during the year 2003, the Centers for Disease Control and Prevention (CDC) estimated that about 63% were among men who were infected through sexual contact with other men.
HIV incidence and prevalence are high among MSM, and many are unaware they are HIV positive. The high level of unrecognized HIV infections among MSM is a public health concern. Persons aware of their HIV infection often take steps to reduce their risk behaviors, which could reduce HIV transmission (9). To increase the proportion of HIV-positive persons who know they are infected, sexually active MSM should be encouraged to have an HIV test at least annually. Corresponding efforts should be developed to address barriers to testing, particularly those related to fear, and to increase the availability of testing in clinical and nonclinical settings (10). Testing programs should target both younger MSM and black MSM to reach populations disproportionately unaware they are HIV positive.
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5424a2.htm
The Centers for Disease Control and Prevention stated the following regarding syphilis in the United States: "While surveillance data are not available by risk behavior, a separate CDC analysis suggests that approximately 64 percent of all adult P&S syphilis cases in 2004 were among men who have sex with men, up from an estimated 5 percent in 1999...."
The CDC reported the following regarding the United States and homosexuality: "CDC conducted sentinel surveillance in 28 cities and found the proportion of cases resistant to fluoroquinolone antibiotics (a first-line treatment for gonorrhea) increased from 4.1 percent in 2003 to 6.8 percent in 2004. Resistance is especially worrisome in men who have sex with men, where it was eight times higher than among heterosexuals (23.8 percent vs. 2.9 percent)."
In 2006, The Medical Journal of Australia stated the following: "High rates of intestinal parasitism are found in MSM [men who have sex with men] throughout the world."
https://www.mja.com.au/public/issues/185_08_161006/sta10803_fm.html
In 2007 the Los Angeles Times reported the frequency of methamphetamine use is twenty times greater among homosexuals than in the general population.
https://www.narth.com/docs/methuse.html
I feel in a similar way about people that are heterosexual and cheat on their spouse, sleep around before marriage, etc. I feel they all have a negative impact on our society, and the excuse that they only affect themselves with their choices is a cop out. Every choice you make affects you and the people around you. They are the core foundation of who you are, how you interact with others, and form a base for future decisions. Even choices we make when we are alone have an impact. Each choice is a stone tossed into the lake of life, and the ripples from that splash will be there either large or small depending on the size of the stone (choice)… but they will definitely be there even if we try to be blind to it.
By the way there are more links, studies, statistics, bla bla bla out there if you care to look for it. I’m sure one of you will look into debunking the doctors, writers, researchers, and whoever did this work, while finding plenty of quotes, research, statistics, doctors and whatnot to “prove” some other argument.
I just threw this sample together to show there is information out there to backup what I believe and think even if I usually don’t care to throw it around. I apologize if a link or two do not work, I haven't had to time to test them all to make sure they go to the right places.
I'm sure you will be my beta testers and let me know every flaw in the post.