In order to continue talking about atheism, we are simply setting foundations when we talk about other religions.

Being baptized is great! It is baptized into faith in Jesus salvation. If you formally reject Jesus salvation, your baptism becomes useless except to keep you in good graces in the Church who can't see into your heart. Faith in Jesus salvation is what saves. Baptism exists to strengthen that faith. If the faith isn't there, the baptism doesn't have anything to strengthen. It is useless.