Oh dear, it seems that some people have pretty much reinforced Werewolf's point and decided to complain about pretty much what he was talking about.
I've had a look back at my threads and the last SJW thread I created was about the New York Times hiring someone who had made a whole bunch of openly racist tweets, albeit towards white people. Now I'd not consider that merely a politeness issues.
It is cases when identity politics goes way too far that I'd generally take issue with. I think a reasonable (but perhaps crude) test is to just switch the genders/or races around and ask whether the same thing/statement etc.. would be bigoted then.
For example I don't have any issue with feminists who state they're feminists in the sense that they are simply fighting for equality - that's great, there was a movement a couple of years or so ago where various men came out wearing the t-shirt with something along the lines of "this is what a feminist looks like" etc.. but I'd not self identify as a feminist as plenty of feminists seemingly aren't fighting for equality but are instead just seeking to advocate for women, gain things for women and in some cases just outright attacking men. It is not uncommon to see generalisations on social media about say "men" and inevitably some guy will chip in with "not all men" and the feminists get triggered. "Mansplaining" is another thing, ostensibly a phenomenon where men treat woman as though they're a bit dim and speak to them in a patronising way but now used to attack a man simply having an option on some issue related to equality.
I think one of the latest SJW outrages is about comedian Jack Whitehall being cast as Disney's first openly gay character - back to the crude test - flip it around and imagine complaining about a gay person playing a straight character... you'd come across as rather bigoted if you were to complain about that. Indeed thankfully the likes of Stephen Fry have come out in support of Jack, acting is acting... granted the (crude) test doesn't work if you'd wanted a white person to black up but if you want to switch the race of a character then that in itself shouldn't be controversial (if you're doing it for the sake of it, because muh diversity, and it doesn't fit then there might be complains about how it is silly but it shouldn't generally be an issue).
Anyway I don't think my typical objections about SJWs are much to do with politeness or fairness, if anything they're generally about how people aren't not being treated in the same way/unfairness is being demanded because some aspect of a person's identity means they should be treated differently. Like a person from a minority group being given a free pass re: having made overtly racist tweets.
