Did everyone get what Crossman is saying? He is saying that it is not obvious to him why a MWI believer would hesitate particularly to play quantum Russian roulette with bullets in half of the chambers of the revolver!

Sort of, with the necessary caveats that we're assuming he doesn't care about how the act affects other people, and also isn't worrying about the possibility of surviving in a brain-damaged state, etc.

Clearly then Crossman disagrees completely with Eliezer

That's a bit strong. I said something wasn't obvious to me, which is hardly the same as complete disagreement. :-)