This does not exclude you; It's directionless and self abnegating. We're all a little crappy, so focus on those who choose not to at least try. It's a much more valuable use of your energies.
I have trouble imagining a way I could be impressed with humanity in general, without actual willful ignorance. I'm not a dick about it, though. Kind of the opposite; it makes it a lot easier to refrain from judging any individual person.
Not really, all it requires is theory of mind, social norms, and the ability to anticipate outcomes. Plenty of animals exhibit comedic behavior patterns, but they all know we're funnier.
Really? As in non-primates that respond positively to humorous displays? Mostly I just see people anthropomorphising animals doing accidentally funny things, sometimes including legit pain or fear responses.