Human rights rant (mainly religious beliefs...)

Alright I think I genuinely need people to understand that I will NOT continue being friends with someone who discriminates against a certain group of people...

SPEAKING OF WHICH I have this friend who literally makes hating religion their entire personality, I cannot count the amount of times that they have posted something about how "Religion is a mental illness".. Listen I understand that they are an atheist, however so am I, but I don't go around calling people mentally ill for their beliefs? And then they say something like "it's just my opinion don't attack me" dude this is human rights we are talking about hello... And then the second you call out their behaviour they get all pissed at you and later post "you're the reason I want to kms" like I'm sorry I called out your shitty behaviour...? 

I understand that some religious people are hateful, but grouping everyone together isn't right under any circumstances and I will stand by my point because this is just straight up discrimination...