I just noticed that at least 3 of the 4 glaring characters in the last frame are the oppressed character in the prior frames, and that puts a completely different spin on the whole strip. Now I take it to be about how the bigoted white man's past is finally catching up with him. And in which case the whole strip is nothing more than a trite, one dimensional exercise in liberal propaganda masquerading as intellectual posturing.

In short it's saying that Cancel Culture for the first 500 years was practiced by the oppressor. But now the oppressed have the upper hand. Take that, evil white man!

You have an interesting take on it and one that I didn't even consider, but I think you're reading too much into it. Though you make a valid point about how facts do not matter when it comes to left ideology; Revising history is one of the main tools in the Marxist playbook.