They have no obligation, legally or otherwise, to host content they don't agree with. That isn't censoring. Are you censoring them for telling them what they can or can't do with their servers? You choose who you let in your house and if they say things which demean yourself, family, ie, associates, then like anyone I'm sure you might tell them you don't want to host them. If you're a store owner you have a right to tell someone to leave if they're denigrating other customers, ie, their desire, perhaps some might say right, to shop without harassment. I don't know why the obvious keeps having to be explained here.