Wouldn't it be nice if everybody could raise their children without instilling any deep-set religious beliefs in them? After all, if a child is raised religious, or even atheist, then one of two things can happen: 1) They stick to that belief all their life, without ever exploring any other possibilities. 2) They reject the belief later, and then resent you for drilling it into them.

When a child comes home from school saying "Mom/Dad, my teacher was talking about God today... Does he really exist?"... wouldn't it be nice if we could forget our personal beliefs, and just say "some people think so, but some don't..."?

That would be a great thing... but I don't think anybody can resist moulding their children's beliefs to match their own. After all, if you don't, then you're a bit of a hypocrite, aren't you? Encouraging a belief you don't really hold? Ah well, that's the nature of humanity, I guess.