As far as adults go, I don't really give a rat's ass who's encouraging whom to do what, as long as the other person is able to say no. Like if I see a hot girl at a bar, I think it's perfectly reasonable for me to "encourage" her to have sex with me, 'cause she's perfectly capable of telling me to fuck off. In general, I think there's a lot to be said for thinking of right and wrong in religious matters in the same way one thinks about right and wrong in sex. The parallels are useful. Feel free to apply this idea to your example above.
if another child in you kids class were to bring a koran and try to convert you kids i suspect you be up in arms.
You mean your kids, your kids and you'd be? And you're a self proclaimed holier than thou intellectual? LOL
No, because I would actually teach my kids about why the Koran is wrong. I wouldn't be like parents who just say "Oh those muslims are just nutjobs" or other Character assassination attempts that bible haters use but never explain why.
The different religions should be an elective course given at the high school level for those that choose to study such things. Frankly, I think people should give religion some thought and study before making up their mind. However, younger children should not be exposed to it in the classroom. Good moral principles can be, and should be taught without bringing religion into it. Religion can be taught at home, or in a church should the parents choose to do so.