I think Erickson dwells on past indiscretions, which I know God will forgive (if Trump sought forgiveness, which, by his own admission, he has not), so I would forgive willingly, but otherwise, his points are valid and worth considering.
As for me, Trump thinks he can play the part of a Jesus follower, because he knows the words (the best words), and someone is whispering in his ear, "This is what The Evangelicals want to hear." Unlike George W. Bush, who I knew was sincere when he said "It will change your life" with respect to accepting God's Grace, Trump has no conception (or intention?) of this. Maybe he never listened in Church, maybe no one ever shared the Good News with him, maybe he's just too arrogant to accept that there is a God who holds dominion over him. Who knows. I hope someone can lead him to the Lord, and he'll accept willingly, but for now, folks, his words are not the words of a man who follows or has accepted Christ as his savior. They are just not the right words.
Still, that is not a requirement to be president of the United States.
What is important is, just as Trump is playing the caricature of a conservative, he is also playing that of a Christian. In so doing, he defiles both.
I'd prefer honesty from Trump. Don't read to me from "Two Corinthians" or tell me how beautiful your Easter Church is and expect me to buy your con. Especially when you can't even complete the con and say you've asked God for forgiveness for even one thing, much less for your sinful soul. This is how egotistical this man is. He sees the trappings of Christianity and tries to play into them, but on the core of the religion, his ego prevents him from even completing his own con game. Sad.
This isn't advice to Trump, as I know he's immune to it. But for others, try honesty. I don't care if you're irreligious or atheist or agnostic, if you respect the Constitution's protections for religious freedom and are prepared to support and defend them, that's all I care about. I think religious people who care about their freedoms would also understand.
Honest atheists/agnostics like Penn Teller and Charles C.W. Cooke are examples of people who I would be perfectly happy defending religious freedom.
Con man Donald Trump, does not inspire confidence.
But YOU, Dear Reader, you go right ahead and vote for him.