Home schooling probably wouldn't have this problem. Jesus talked more about hell than heaven in the Bible, so it is the same thing. As long as there is no harm, as for words would not ever hurt me.

A lot christains say hail satan all the time, but use the name Donald Trump to make more friendly.

Not as long as they ban all religious iconography on clothing

Whatever "offends" a person is a purely subjective response to another persons statement or opinion.
No one should ever have the power to project thier own fragile sensibilitys onto another person in an attempt to control or suppress them.
To all the professional whiners out there, that's your problem not mine. I suggest you go hide in your "safe space" and deal with it.

Of course it's discrimination . I am just as offended by that as any other religious nonsense

Some believe Satanism represents sadistic human sacrifices and general malfeasance. Some see Satan as rebelling against oppression, mind control, and patriarchy. Some see Satan as a joke. Some want to be scary. Some claim to be Christian and then do awful things. Some could easily argue that a dude hanging on a cross is a disturbing image and therefore ask for no crucifixes. Really the salient issue is how are the children treating each other.

Most of these school boards aren't populated with intelligent people.

Yeah, probably.