Good on you for approaching it in a respectful way rather than mocking your parents’ faith like some people do. It can be very hard for parents when their kids leave the religion they grew up with, so respectfully asking questions for now will make things easier for everyone.
Exactly. Don’t burn any bridges unless you absolutely have to. So many people are so quick to leave their religion or come out or whatnot that they can cause irreparable damage to relationships that may one day become very important to them again. Respectful and tactful is always the way to go, in my mind.