But do you see the difference between teaching people about structural racism and having them stand up and declare "I am a racist" and "I am a gatekeeper of white supremacy?" Two things about that are outside acceptable norms:
1) Having people declare personal complicity for a general social ill; and
2) Using words that have widely-understood connotations to mean something different in order to achieve shocking rhetorical effect.
It's not just inconsistent with social norms, it's alienating to many non-white people. I don't think the well-meaning white people doing this (and almost everyone involved in this is white) really understand that we have to actually go on and try to interact normally our professors and administrators after this.