Most of the time you don't have to worry about a No True Scotsman, because they'll say something like, "I used to be an atheist. I was always mad at god. Yada, yada, yada..." Usually they make it so obvious that it's just a misguided, cheap debating tactic that you're completely justified in calling them out on it.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell