I don't want to raise our kids religious
Why don't you want to raise your children in a religious background?
I prefer giving children the ability to choose when they are older.
I can understand wanting to make your own religious choice. As a religious person, I would start just to make sure that you are giving them a moral upbringing, to keep them from making poor decisions in life.
I believe children are a blank slate, but I agree with you. My husband is afraid they'll be corralled into adopting religion before they've had a chance to think about it.
This is an issue the two of you will have to resolve. You could go one way or the other, or just agree to disagree.