Attempting to take away people's slaves also led to a civil war.
you are profoundly ignorant of American values, and history.
For example, I have found credible accounts and documentation that both the Abolitionists and the Secessionists in the run up to the Secession of the Southern or Confederate States, that implicate British foreign agents in financing and promoting these causes.
The British, for the convenience and profit of the British Far East Trading Company imposed laws and taxes on American businesses that in any way competed with the BFETC, and denied to American colonists their common British rights under the Magna Carta, including restricting their right to possess arms.
The banking folks who financed and promoted Lincoln in his run for the Presidency chose him because his views on slavery were especially provocative to the Southern slaveholders, but they expected when the Southern States seceded, Lincoln would just let those states go their own way, thus weakening the United States to make it more vulnerable to British exploitation once again. But as much as he believed in ending slavery, Lincoln believed more in the basic liberties vouchsafed by our Bill of Rights. And regardless of all attempts to get him to do otherwise, he stood for the Union as the best hope for human rights in the United States.
It is a point in proof, that when Lincoln issued the Emancipation Proclamation, he made it effective only in the States which had seceded. Slaveholders in Missouri and West Virgina for example, did not release their slaves because of that Proclamation. Eventually that became the sense of the public sentiment and legal interpretation of the Emancipation Proclamation.
But the whole reason we are the United States is just that we rejected British rule, and chose to uphold human rights against British arrogance and the imposition of the those elitist values the British royalists, which a whole lot of Americans will fight to the death for once again if stupid dupes of British influence, as the UN folks are, try to destroy American concepts of human rights.
You obviously have drunk the Brit cool aid, and I hope perhaps you will wake up to the facts.