No Opinion - How come??!!!!

Actually i am a kind of a person who has an opinion on every topic.........But this is a topic which i have been thinking for quite some time now, and still unable to come to any sort of opinion or conclusion on it. And the topic is, A hindu or a muslim girl/guy get converted in to a christian if they want to marry their partner who belongs to that community. The chirstian family accepts it very happily.....whereas the same option does not exist in hindu or muslim community. How right it is ? do we need an option, or letting go of your religion to marry your love ???? do ppl who get converted for their love, do they really follow the religion and its principle......and on and on and on....i have been thinking on it, but unable to come to a conclusion.....