Political parties are not inherently religious, hence nearly every major party is comprised of people of all the same religions. But political parties do take stands on issues important to people that impact their ability to practice their faith. And that does influence voters.

I think you are confused regarding who Christians are... they are not perfect people... in fact, what sets them apart is an awareness of their imperfections and their need for a Savior. Neither does that recognition transform them instantaneously.

Meanwhile, your "End of Christianity" provocative headline, made me chuckle. It reminds me of when Napoleon threatened an archbishop that he would destroy Catholicism. Here is the story as told by Taylor Marshall.

“Napoleon Bonaparte once taunted a Catholic cardinal by threatening: “Your Eminence, are you not aware that I have the power to destroy the Catholic Church?” To which the cardinal quipped: “Your Majesty, we Catholic clergy have done our best to destroy the Church for the last eighteen hundred years. We have not succeeded, and neither will you.”

Trump is Trump. Christianity is Christianity. Voters can be Christians and Trump supporters or Christians and vote against Trump. Equating the two is almost funny.