Are you insinuating that all Muslims support child marriage? Because it certainly seems like you are.
I'm a 'leftist', but also atheist, so I certainly don't support Islam. But I will tolerate people who believe in it. Same as I'll tolerate people who believe in Christianity, which has plenty of weird shit of its own.
Additionally, I'm opposed to the 'cancelling' of Richard Stallman. It's fucking stupid.
Maybe you should try to not paint all 'leftists' with this stupidly broad brush you're using.