Humanity is not evil, there are just evil humans. Yeah, I see things that people do that enrage me to no damn end and I want to just rid the world of those types... but without evil, there'd be no good. We'd all just be. Funnily enough, learning something as evil/cruel/mean/whatever, teaches us how to actually be good. Likewise, being good teaches people how to be evil. To claim the whole of a species should disappear due to one's own preconceived notions is as ignorant as the people killing things in such unnecessarily gruesome ways, if not more ignorant, even.
The human mind retains all negative thoughts more strongly than positive ones, specifically for the purpose of teaching you what to stay away from. But with the evolution of human intellectuality, it also has come to be the vessel that teaches us wherein our morals exist, and it's now a vessel we can adapt based on acquired information.
So in short, to claim that a group of individual organisms are all the same or can all be lumped into one group beyond their scientific divisions is the most asinine rejection of common sense and akin to noticing everything but the elephant in the room.
And yes, this is my vent because I am so sick and disgusted by how prevalent this "I HATE HUMANS/humans should disappear" mindset is. Saying that is as much of an insult to one's friends to the man who just got done rescuing a puppy from a burning house. Humans have just as much of a capacity for good as they do for evil. I don't hate people, I hate bad people.