Why are all atheists liberals?

[Cephus]

They're not. Last I saw, an estimated 20% of atheists are conservative, just like I am. There are plenty of conservative atheists out there, they just don't tend to be as vocal about linking their conservatism to their atheism as many liberal atheists are. There hasn't been a conservative atheist movement to declare that if you're not a social justice warrior, you can't be an atheist, which isn't the case for liberal atheists.