I doubt that law will withstand a challenge on constitutional grounds.

Once these courses turn into proselytizing some secular group (FFRF) will go after them. Higher courts and even the Supreme Court has already ruled on the unconstitutionality of this and all that will happen is that those schools will lose a lot of money in lost lawsuits.

Personally, I don't think school is the appropriate place to instill dogma, but if it is a comparative lit class, I can see it. As long as it is not mandatory curriculum.

If it is taught as a regular course without any preaching and students are allowed to question, I'm thinking they may end up with a lot of atheists at that school.

Taking four semesters of World Religions made me the atheist I am today

Sweet!

That means we can also teach Satanism, Wiccan and Celtic paganism.

Funny anecdote, I have known a few Satanists in my life and they were the most pro-self defense (as in learn to fight well), honest, uninhibited, fiercely loyal people I've ever known.

Can't teach one if you don't teach them all.
Won't stand up in court.

If they are going to teach religion they should teach all religions.