You have a weak opinion of Christians, as if they can so easily be lead away from their principles. How is Trump attempting to (re)define Christian principles rather than (re)establishing them?
Mammon worship, cheating workers, immorality, self-idolatry, abandoning the poor sick and foreign, hating your enemy, and embracing lies and hypocrisy are not Christian values. For a Christian to support trump, ya gotta look the other way on these, or worse yet embrace them.
The fruit of the Holy Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control. There's none of this going on in maga circles.
Not much of either of these going on in liberal circles either - but I don't need to convince anyone here of that.
It's this idea that the enemy of my enemy is my friend that people need to recognize. He's not your friend.