I'm a left wing atheist. While people like Dawkins and Hitchens may declare religion the root of all evil, I try to have some self awareness on the subject. I look at the 20th century and need only pick two names, Stalin and Mao, to find left wing atheism being drenched in blood.

Killing for a dogma is the issue. And those who claim that religion is responsible for all misery are precious few philosophical steps away from doing exactly that.

edit - for some perspective, here's Tony Benn on the many links between socialist ideologies and christianity. - https://jacobinmag.com/2018/12/tony-benn-christianity-social...

edit2 - For another perspective, while the crackdown on christianity is harsh, the crackdown on muslims is next level. Which is odd on the face of it as muslims tend to be more left wing in practice than christians.