I see overt racism almost every day in the USA. You do have to pay attention. People get treated different because of their race constantly.
In SLC I can jay walk anytime in front of a cop and they never care. My friends of color get harassed constantly for that. No one ever asks for my ID when I pay with a credit card. Its maybe happened once in my life. My latino friends in SLC get ID every time they pay with a card. Bars usually dont make me give them anything when I sit at the bar and order a drink. They just start a tab and I pay at the end. One of my black friends I go with to the bar gets asked every time for a card and sometimes for an id to go with the card, even at bars that he goes to frequently. In almost every situation people give me the benefit of the doubt. That same courtesy is not nearly as often given to others that are minorities. Cops let me go all the time with warnings. Cops rarely give me a second look in public. Employees never keep an eye on me in a store. The list of overt racism I see goes on and on.
Oddly people said China was racist towards white people but I have yet to see it. But ill keep paying attention. Maybe its my job here, but people here show a ton of respect to me and really value everything I say.