Voted for Option 3, but I wouldn't base my opinion of someone's religious conversion on how it relates to their parents' religions. The only way I'd have a problem with it is if I had a problem with the religion itself or if it was a cult or something. Or if, say, they converted to Catholicism because they hate gay people (whereas someone converting to Catholicism for aesthetic reasons, I would have more respect for).
I didn't know that anyone had this specific hangup. Are these religious people that have this problem, or non-religious people?
If by "this specific hangup" you mean "conversion is bad" mostly non-religious here actually.
Sounds like atheists who just want an excuse to criticize religion? I wouldn't read any more into it then.