I'll give you your answer. Because it struck too close to home. The NPC meme is a satirical mocking of a loud-mouth leftist pundit/politicians point and those who suppor it.
How convenient, that you think that the reason people object to something is because it's true. I assume you thought precisely the same thing about Clinton's "deplorables" assessment?
Conservatives find this funny because they can and regularly engage in self-deprecating humor. Progressives do not.
Okay, first, that's complete bullshit. If anything, progressives are more self-deprecating, at least as far as actual comedians go, though the sample size for conservative comedians is incredibly small.
Second, this isn't self-deprecating humor. That would require liberals doing it to themselves, not political opponents doing it to them.
Again, if conservatives were all right with that then we wouldn't have seen the absolute batshit insane overreaction to Clinton's "basket of deplorables" comment that we saw.