A lot of work was done to imply that I contributed to the same racism that sustained slavery. What was worse in my eyes was that according to my school, the only way to fix this was for me personally to give the power and wealth stolen from black people back to them. I didn’t have either, so naturally as a sinner I got upset.

I'm also white, and a product of the California school system, so there is probably some degree of commonality to our experiences. Although I can't speak to your specific experience, I'd advise you to reconsider your claim that "a lot of work was done to imply that I contributed to the same racism that sustained slavery." You seem to present yourself as a tabula rasa upon which anti-white propaganda was being forced. Rather, I'd argue that your perception that your "school made an effort to make it about whites versus blacks" was spurious and was actually the product of your own ideology which you had previously absorbed from those around you (via parents and through a conservative church, if your life mirrors my own). Your response was therefore not "natural," as you seem to assert, but was rather the result of your own nascent beliefs, namely American conservatism. In other words, you interpreted your teachers/professors as being anti-white, because claims such as the existence of systemic racism conflict with your own unexamined white-identitarian viewpoint.

It's easy to decry alien viewpoints as "political," but accept our own as being somehow non-ideological. Many conservative Christians will lash out at ideas like "systemic oppression" as "identity politics" because but don't recognize that their own ideology is essentially white identity politics.