You are objectively incorrect almost across the board but especially about what “MLK was looking for.” See: https://www.diverseeducation.com/opinion/article/15661878/ho...

> I'm presently in the most oppressed group -- I'm a white heterosexual male.

The group you are in is the perpetually seeking victimhood group.

> All the DEI training materials claim that I'm "inherently racist", which is a ploy to punish me unjustly.

Right, the problem is not the actual racism rather it’s pointing out things that could be racist and making racists feel bad about being racist.