Frog, in school the children are required to study English -- but, they can ELECT to also study French, Latin, etc. There is never a call to offer ALL world languages as ELECTIVES -- only a select few -- the important ones. So, yes, schools can cover all bases by offering ELECTIVE classes in the Bible and another in the CULTS. This would cover all the other religions. Actually, most schools do offer a class in World Religions. I was asked to speak at one of our local colleges in their World Religion class. I will be happy to share that PowerPoint presentation with you if you like.
God bless, have a wonderful, blessed day,
Bill
Oh seriously, surely you know that teaching a language to children does contribute to their education and future ability to become employed and communicate, and you do know that religion is NOT the same as a language at all, but you don't want to admit there is a difference. Religion is simply a personal interpretation of beliefs, and I wouldn't want a class in Atheism taught either since it is part of a personal belief system.
You are seriously blind if you don't see that many other religions of the world see Christianity as a cult and would argue that YOU might think yours is one of the important ones, but others may not. You talked at a college? Wow, how awesome! That doesn't make your religion any more right or "the only" one, you know. I think it's awesome to have a World Religions class in college, but NOT in anything below that since kids can go get that at home/church if the parents desire (and ours have and will continue to). They are old enough in college to at least begin to understand that your view is just that...your view, and they have hopefully received the tools they need to process the professors' information as a study of literature and not a religion class that tells them there is one way to think more clearly than at younger ages. They or the parents pay for whatever they learn and if they want to get a degree or take a class in religion cool beans. I'll pass on the PowerPoint, thanks, although I'm sure it was interesting. I'm sure the students thought it was, too, but perhaps not in the way you think.
You outdo yourself sometimes. 
A class in the Bible and one in the cults...you just made my point. If all the others are cults so is yours, but you won't see that and that is why religious education doesn't belong in public schools.