Man, I'm not saying that his wife didn't love him. I'm not saying that his death wasn't tragic for her and many other people. I'm not even saying that I'd heard of any of these people before today. But without any other context, I just can't see "incredibly rude and grotesque" in there.
What I am saying is that he was a divisive character, and he knew that, accepted it, apparently tried to modify it a bit but basically carried on with it in an organisation that he knew was at least mildly hostile to his beliefs.
And the depth of emotion that he inspired (deserved or not) could have lead to a very ugly pile on after his death. Maybe that happened anyway. Instead of taking it as cheap sniping, a better-faith reading of Mitchell's eulogy would be as a call for peace - acknowledge the critics but also point out the valuable contributions that the guy made in the hope that all the emotions surrounding his death don't spill over onto twitter or somesuch stupidity.
https://groups.google.com/forum/#!forum/lightandmomentary