WARNING: Long rant.
It's because we don't want cunts like you, angeltress, forcing your religious beliefs down our children's throats. If a child of mine decided to convert to a religion, I'd support them (well, I'd quietly disapprove, but I wouldn't get in their way as they'd have a right to believe what they want), provided they'd thought it through, they were sensible about it and they'd decided to convert for themselves.
However, that's up to them. It's also up to parents to decide what their children hear pertaining to religious matters, not up to you.
That is why those secular laws banning prayer in the classroom exist. So my children can't have your religious views rammed down their fucking throats.
So don't take the fundamentalist's typically politically correct approach of complaining that those laws preventing you from forcing your views on little kids (and thus breaching the human rights of them and their parents in the process) is a breach of your human right (specifically, to free speech).
Why? Because fuck your rights if they breach the rights of others, as then they aren't valid. That's fucking why. What about the right of all those parents to teach their kids how they see fit? What about the right of all those children to come to school to learn, and not be fucking indoctrinated, or scared by threats of Hell?
Those rights are just as important, and your rights stop being valid in situations where exercising them breaches the rights of others. That's how it fucking works, that's the only right way, and that's why it's the fucking law.
People of all faiths are sick of having their children indoctrinated, scared, intimated, told not to think for themselves, and told what to think by cunts like you.
So take your claims of human rights violations - which are probably non-existant in this case anyway, and won't hold any water with someone who has half a brain - stick them up your fucking arse and jump in the nearest available fire.