Like hell it is. What they want their kids learning is irrelevant, it's a travesty of "religious freedom" that we don't require this cult to educate their children to the same uniform standard as every other person in our society.
There is no uniform standard of education in the US. Kids in the South are being taught that evolution is on par with intelligent design. Poor black kids in Baltimore have on average a 3rd grade reading level in high school, while rich kids a few counties away are taught when to use a backdoor roth ira. Don't even mention "no child left behind".
Maybe let's calm down a bit with the judgement.