I'm answering your question.
I think I see you thinking. Correct me if I'm wrong. You don't want the teacher indoctrinating the children. Is that correct?
Indoctrination is a loose term that implies hyperbole and I know where you are going with this.
Let's stick to religion.
I don't want public school teachers reading scripture to school children or leading prayer, and I support the law as it stands on this. Your assumption is that, if this were allowed, every teacher that engaged in this would be Christian. However, quite hypocritically, if a teacher started reading out of the Koran in front of class, you guys would have a shit fit.
Evoking religion as it relates to history? No problem. Religion is an important facet of history. I draw the line at proselytizing.
If you are convinced your children are being deprived without religion in the school, send the to parochial school. It's not against the law (quite logically) for religious schools that are privately funded to evoke religion in the class room.
It is against the law to use taxpayer dollars to support a glorified bible school.
Again, simple.
Again, how have your right's to practice your religion been hindered by the government?