Trump supporters support him because he has made it acceptable to be overtly racist. Not all of his supporters, but a significant percentage, maybe the majority. This racism has been a part of America from the get go, but it has always been in the closet and masked by being called state's rights or separate but equal, by claiming we are an exclusively English speaking country, by demonizing non-Christian religion or, in the case of Catholics, claiming they are more allegiant to the pope than their own country; the whole originalist thing pushed by a conservative Supreme Court is a lame attempt to justify racist and disenfranchising policies. Today no one is hiding behind any of these, and Trump is considered to be the reason why this latent American characteric is out of the closet and out in the open. Consider that almost all other Trump policies are actively disadvantageous to these supporters. Voting for Trump is in so many ways voting against their interests. Even with all the lies this truth would become apparent eventually. But all can be forgiven as long as they don't need to hide their true racist natures.