“It’s almost conservative porn. You almost think, ‘Oh, yeah. Ooh, that’s erotic,’” is a thing Glenn Beck once said about the novels of Vince Flynn. But can those bastions of thriller-packed airport bookstores make decent movies from time to time? Maybe, sure, why not? Chris Hemsworth might be convinced (or not — it’s a $10 million role), if he accepts the offer to play Flynn’s perennial hero Mitch Rapp in American Assassin, defending wholesome values against Islamic terrorism and everything vaguely foreign.