Notice that the student who asks the question wants to know how to do this without getting fired … so he’s well aware it’s unethical and dishonest for a teacher to do this, but he wants to know how to do it anyway.

I don’t think these people do know it’s unethical. They have a firm belief that they as true Christians have a monopoly on truth and virtue. Any attempt to keep them from pushing this view on others is seen as an evil, thus to many people pushing God into the public schools isn’t wrong, it is in fact the highest good.