You make really good points, and they're totally spot-on, but I don't think the analogy holds very well because stereotypes of white people aren't used by poc in a systemic way to control, demean, and inflict violence on white people.

Bringing up the prospect of poc committing violence against white people makes it seem like there's an equivalence there, which can play into the 'reverse racism' moral panic, and can reinforce the conception that the suffering of poc is lesser than the feelings of white people. If a hypothetical white person's feelings are taken more seriously than thousands of actual poc's feelings, doesn't it kind of reinforce the dehumanisation you're trying to unpack?