And he comes out of the corner swinging! He's right, of course, but that doesn't stop people from positing Constantine as the "real" founder of Christianity. Never mind the facts, presupposed reconstructions take precedence! Besides, conspiracy theories sell books, and that's what's important, right? Never mind the truth, we want income! And the truth withers and dies—and then people wonder why alternative facts are preferred. Duh! You train people to believe in conspiracies and then expect mere facts to change their minds?
You still reap what you sow. We've been sowing a wind for a long time now and we're starting to reap the whirlwind. Take a look at this about the less than desirable effect of the loss of a Christian influence when it comes to prejudice. Mind you, it's from The Atlantic, not exactly a bastion of pro-Christian thinking!