That just seems really weird and rude of them. I mean, it sounds like they didn't really want to play and just joked/sabotaged the game to get it over with. They shouldn't have bothered calling you out there if they didn't want to finish the game.

I don't think that is how "normal" people react, by doing weird stuff and trying to kill off their characters when they don't feel like playing. They would say they don't feel like playing. If they felt obligated to play, you'd think they would also feel obligated to continue in a respectful way.

Sorry that this sort of thing happens.