>>819227
>For example someone was baptized as a baby in the catholic church, but was then raised in a muslim family. Does he count as a Christian when he believes in Christ, but was raised muslim and was only baptized as a baby?
Technically?
I mean, he never consciously apostatized.
>And what if he wants to convert to protestantism (I don't know maybe lutheranism)? Does he need to get baptized again? Or does the catholic baptism also count for the protestants?
Some protestants accept pedobaptism.
Others don't, consider it invalid, and think you need to be old enough to understand christian theology to be baptised.
Protestantism is like that.