First of all, honor all religions. The real problem is that they don’t know their own religion completely.
Tell them to first understand their own religion, study and go deep into it and then decide.
When you are converting religions, you are implying that this religion is not good, which is why I am taking another one.
If you go into the root of any religion, you realize that all religions are one. And so you honor, learn from everybody and grow spiritually.
Conversion should be from the head to the heart, from badness to goodness and not from one religion to another.