He isn't entirely wrong but his tact could do with some work. This email isn't that bad but the others in the thread are less savory. I agree with him in princ

He isn't entirely wrong but his tact could do with some work. This email isn't that bad but the others in the thread are less savory. I agree with him in principal however, the persona non grata clauses have no place in open-source licenses. IMO the problem with the political correctness debate is your are damned if you do and damned if you don't. Even if everyone knows that is the motivation behind such an effort you can't call it out as such without becoming vilified - regardless how how you reason your argument. (not saying ESR did a good job here) This results in many, myself included simply not taking place in such debates and eventually just not taking part in communities where this sort of discourse goes on. There is a big difference between codifying the "don't be a dick rule" and making normal people feel like they are stepping on egg shells.