My dad is a pastor, so needless to say I grew up in a fairly religious household. I always hated being taught about Christianity in school because I was getting so much more from home and from church. Also, the school version of Christianity either oversimplified my beliefs or got them wrong by focusing on either Catholicism or evangelicalism (we're moderate Lutherans, which feels like a halfway point between the two).
I LOVED learning about other religions in school because it was something that I didn't already know.
If this dad needs the public schools to teach his children about Jesus, then maybe he needs to step up his own game. I hate being so blunt, but it's time people a) move past Muslim=bad, and b) realize that religion can be taught in the home and not the public schools.