We have it all the time. There has been a huge influx of Indian people into my area in the last 10 years. The majority are Hindu, but there are some Sikhs and some Christians amongst them, as well. Of course, this is a much more Catholic area than most of the United States, and the majority of the hardcore Catholics here send their children to Catholic schools, anyway. I haven't heard of any problems with religious expression at the local public schools recently. The U.S. is better with this than many other countries, actually. Look at France. It's a Catholic country, but only 20-30% of the population are regular Mass attendees. And yet, they have tried to ban Muslim girls from wearing their headwraps. It's a matter of mindset, mostly. I actually tend to think that the majority of non-fundamentalist Christians would make sure that students of other religions would be free to express themselves, because they would flip out (and have) if the school tried to suppress Christian students.