Comment: No, they wouldn't have left, because that would give the extremist outliers too much power over the whole of the right wing.  You don't let the extremists among you control everything.

Both sides of the political divide have extremists 4 standard deviations away from the mainstream of both parties.  You don't let a handful of them motivate the entire rally or convention to shut down.

Ever been hit in the head by a 5-foot long 1" by 1" board with sharp corners?  It's like getting with with a baseball bat with edges that can cut.  I carry a slightly narrower stick like that on the floorboard in the back seat of my car that's made out of Brazilian redwood that so hard you can drive a screw into it without pre-drilling.  I'd rather break your arm with it than have to shoot you.