Not sure why you're being down voted. I'm sure there are some folks homeschooling because of things like racism, but that has always existed just like evangelical christians have always been big into homeschooling.

If there is a big uptake, it's likely due to the ever present threat of school shootings coupled with all the things you said above. I have to teach my kid a lot outside of school and they go to what is considered a good one. The only reason I send them is my spouse and I work and my kid needs to learn social skills. If I won the lottery, I'd homeschool them myself and do it for a few other families as well so that my kid can get the social aspect too.