"I can't see why they can't be exposed to all religions and understand they have the choice."
But most religions aren't open to choice, are they? Certainly Christianity is pretty absolute, looking at the decalogue it clearly states
"I am the Lord your God, who brought you up out of the land of Egypt, out of the house of slavery;
3 Do not have any other gods before me.
4 You shall not make for yourself an idol, whether in the form of anything that is in heaven above, or that is on the earth beneath, or that is in the water under the earth.
5 You shall not bow down to them or worship them; for I the Lord your God am a jealous God, punishing children for the iniquity of parents, to the third and the fourth generation of those who reject me,
6 but showing steadfast love to the thousandth generation of those who love me and keep my commandments"
(Exodus 20:2?6)
So either you fully observe your religion, which means your intolerant of other faiths and worldviews, no matter whether their atheist, polytheist or monotheist with another God, or the whole exercise is pretty pointless anyway, isn't it?