What is is this nonsense about hating humans?

I have heard this thing about people hating humans.. What is this about? Not trying to bash anybody..it's just your a human yourself...

You don't have to..you can choose to be whatever you want to be but I bet most people will assume you are.

for me there are 2 type of people hating humans. 1.the self hating people with low self esteem like the red pill society bunch in reddit,feminist and antifa 2.the people who believes in their god/gods and sees the evil in this world

Some thought people come up with when they get too invested in a cause and start thinking the best solution to their problems would be reducing the number of people in the world.

Dude, it's a figure of speech. Y'know, like when everyone in existance says things like "I had the worst day ever at work," or "That's the stupidest thing I've ever heard."