With respect to that "history according to White people" remark, that was firmly tongue-in-cheek. I don't apologise for making the remark, although I can well appreciate its not being seen in the spirit it was intended. In fact, though, I do expect that people more involved in this movement than I would *would* say that. Make of the accusation what you will, but really it's just a specific case of "history is written by the victors". It is certainly not hypocrisy, whatever you think of it.
Also, please let's not repeat the "anti-British" trope, it's complete nonsense to accuse anyone who says, correctly, that not everything the British people have done in history has been whiter than white is "anti-British". Arguably, the reverse in fact. There's yet another famous quote about history, right, something along the lines of not learning from history means that you are doomed to repeat it? We're made mistakes in the past as a nation, and admitting that is rather a lot healthier for our present and future than constnatly going on as if Britain was the best thing that happened to the world, ever. (This is not the same as apologising for the past. We personally weren't guilty of it, we owe no-one an apology.)
So no. The return charges of hypocrisy, and anti-Britishness, just won't stand. In terms of the original story, I would see it as an excessive response and along with other recent incidents it's sad to see a movement become a parody of itself -- I would really hope that people can see there *is* a legitimate point to all this, that we still have too rose-tinted a view of our own history.