I agree that the comment is in bad taste but what I don't see this being considered a "far, far, far over the line." comment when I take into consideration that it had been posted in reply to the maintainer's also dismissive comment "this patch is boring" so, yes, the user has definitely been rude, but chances are it's a visceral response too.

Otherwise if that event is far far over the line I wonder what out of the blue insults or death threats qualify as.