i was never raised with any religion & was accepted in a catholic convent school (they had to take a percentage of non catholics). i was treated the same as the others & was accepted 100%.
choose the schools without religion in mind & teach your child yourself about catholicism, christianity, budhism, hinduism, sikhism, muslim & all the other ism's you can find & teach them to be open minded & accepting of others.
if they know the difference between right & wrong & have guidence (no matter which religion it comes from) you wont go far wrong.