Some of them have already said they'd be fine with him shooting someone in broad daylight on a NYC street, and think that this isn't an impeachable offense.
That's hyperbole though. they're just showing that they are trumpers until something ridiculous like that happens. I'm sure there are some zealots but 99% of them would not be cool with him murdering someone in cold blood.
It's not hyperbole, this is directly from Congressional Republicans. They believe that "executive immunity" means the President can commit whatever crimes he wants in office, and is immune from prosecution until his term is over.