I think it's a fact, rather than a matter of opinion, that anyone posting the revolting hate filled shit like that GIF (and previous vile posts) is a cunt. It's also a fact than then trying to deny it and back-pedal, makes them a coward.
It is just a fact that McKinnon is a cunt and a coward as well as a man, and we should not be silenced for stating these facts. We should keep speaking up and our voices should be heard.
"in this circumstance, it's understandable that people will feel angry in response to this tasteless tweet." This isn't an isolated circumstance, this is just another symptom of the situation (and the abuse, and the people!) GC women are facing. If our anger is understandable here, it's understandable everywhere surely? Or is there a cut off, saying a man is a man is not OK, and we must call him a woman, unless they are especially vile and we are especially angry? Then it's understandable and OK 
I don't think MNHQ can make a clear decision on what constitutes special circumstances which are bad enough us to allow us to be angry. How on earth do you define something like that?
Surely it would be easier, and fairer, to just allow us to state that a man is a man without this being dependent on their behaviour?
Hopefully this might be the tipping point where MNHQ realise the folly of their arbitrary policies and allow us to state facts. I really really fucking hope so.