Judge them? Maybe they're being held against their will like you were. Maybe they do believe, but they're not as fanatical as your parents. It's not very nice to have such a superior attitude just because you had bad experiences. Did your religion teach you to turn your nose up at people like that?
Uh, "silently judge them" doesn't mean I have "such a superior attitude", people make character judgements based on another person's life decisions every day. It's not like I go around telling them that they're idiots for being in a religion, they will never know that I am secretly judging them, just like 90% of the people I pass on the sidewalk will never know that I think their shoes are hideous. Who cares.