This is absolutely not the experience if you live in Wisconsin. Well over 80% of people here are white.
I'm not trying to make any commentary on that, I'm just citing statistics and my observations.
https://www.jsonline.com/story/news/local/milwaukee/2019/01/...
https://www.jsonline.com/story/news/local/milwaukee/2019/01/...
Would you say something similar about people's skin color if you went to Nigeria?
What's your point with a comment like this? Yes America is majority white and those percentages are higher in some areas. It's not a problem.
Similarly, cities and people in the midwest might be great if you're straight, white, and "normal" but that might not be true for everyone. Will people be as welcoming if they see you as an outsider? Maybe. I try to keep an open mind but I also can't be 100% sure.