The cardinal sin of social media is thinking all opinions are equal. 'If we allow this, we'd have to allow evil.' Why? You are not blind justice. You're entitled to an opinion, and you goddamn well ought to judge people differently when they're rudely fighting the good fight or politely defending total bullshit.
And then evil is allowed anyway, so long as it's big evil. You can sing Israel's praises damn near anywhere. But you talk about one guy getting punched in the face, you better watch your ass. That's inciting violence! As distinct from bombing a hospital! Or, as the case may be, letting people die in a perfectly functional hospital... and then laughing it up with other executives about how much money that saved.