Should religion be taught in primary and secondary school and how?

Religion is a very personal foremost thing anybody can learn. I think that religion should be taught at Primary and Secondary levels in schools. But I believe if there is a mix of different communities and believes in a classroom then it must be left for parents to teach their children about the religion.

Every religion/ belief in the world needs to be respected, so teaching all the students about one religion or the amalgam of religions is not just. The reason is the contradictions between faiths. For example, it is the belief of a Muslim, that there is no God but One Who has not any wife or a son. And if they are taught that Jesus is son of god, it will make them none but confused.

So religion should be taught in schools only when the majority belongs to one set of believes. In addition, when the majority is taught about their religion they should also be taught to think critically.