Why are we afraid of religion?

Yesterday in class we discussed religion in schools. Should it be allowed and to what extent? My question is why are we so afraid of discussing religion and why do we get so easily offended when someone doesn't support the same religious views as us? The reason many people came to this country was because of religious persecution in their home country. They wanted the freedom of religion. Because of this freedom of religion, we now have a variety of religions in the United States. It doesn't make sense that in a nation that has freedom of speech and expression, that we can't openly discuss religious beliefs without offending someone.
I don't think anyone has the right to force a belief onto someone else, so as far as schools supporting one religion over another, I don't think this is right. But why can't we teach children the facts about other religions from all over the world. Many of these religions exist in our country, students just don't know about them. Is it wrong to teach students about cultures? Religion is a huge part of someone's culture, so neglecting religion is neglecting a huge area that leaves a gap in cultural understanding. Teaching about religion educationally does not impose the teachers views on the students. It gives students the facts that they can decide what to do with. We also need to give students the resources and research knowledge to learn more about these religions if they want to. It doesn't have to be required but it should be available for students to learn.
Saying that religion should just not be discussed in schools in being ignorant. It is being completely oblivious to the fact that there are people out there that believe something different from you. What is wrong with that? Not everyone is ever going to agree on one thing. That is the beauty of our country. I don't think there should be prayers before a game this is forcing students to participate in religion when they may not believe that religion. A moment of silence is better because it can just be a time of reflection on the day, what needs to be done, how they feel, how they are as a person and friend, or a moment for prayer.
Sometimes, I think the schools try to take on too much responsibility and are worried about teaching students morals and values. To me, this is ultimately up to the parents. The school should worry about curricular knowledge. There can be education about different religions and their qualities but no one should be forcing someone to believe a certain religious practice.