The establishment GOP is controlled by neocons who will always throw other right-wingers under the bus if it meant appeasing the Left – They “spread democracy” to the Middle-East by bombing the shit out of it when in power and then concede to neolibs on almost every social issue back home.
Representatives should earn their vote, not get it by sheer virtue of being more palatable than the opposition. That’s what they rely on and it’s why they’ll never actually listen to their base.
I would recommend Trump voters do at least some cursory research on who it is they’re voting for, not if they just have an “R” next to their name – Check their voting record, what they stand for, etc. If they’re staunch allies of Trump than back them up. But if they’ve ever gone full Bill Kristol don’t bother.