wiseguyin, I'm from India and trust me I've heard little children from other faiths asking such questions about other religions.
One reason for muslim children to be a bit more "vocal" about these things is maybe because we start off their Islamic education at a young age which parallels their regular school education. So sometimes there are all types of questions that are asked.
We can handle it quite well.
I am from India - AND i AM a non-muslim - till about standard 10, I was not even aware of an "us" and "them" attitude..... No wonder the brain washing starts early in you guys ....