What they think/fear privately doesn’t matter, Evangelical Christianity is a performative religion. The entire goal is to appear to be the most pious prig on the block. What you get up to, behind closed doors, doesn’t matter, unless you get caught. And no one believes that they will get caught. So, the religion devolves into a game of “one-ups-man-ship”. With each one trying to prove how “holy” they are by claiming ever higher standards of “holy”, while basically none of them live up to the ideal they are putting forth. When a member’s discretions get exposed, they then have to engage in a ritual “purification”, claiming how bad they were, that they have learned the error of their ways and now they have found God again (he got lost behind the dryer with the socks). And all will be forgiven, so long as you do not question the delusion religion.