Sucks for them. They apparently haven’t heard of Title VII of the Civil rights act.
"Religious beliefs include theistic beliefs (i.e. those that include a belief in God) as well as non-theistic “moral or ethical beliefs as to what is right and wrong which are sincerely held with the strength of traditional religious views.”
“Religious observances or practices include, for example, attending worship services, praying, wearing religious garb or symbols, displaying religious objects, adhering to certain dietary rules, proselytizing or other forms of religious expression, or refraining from certain activities.”
Those quotes are from the US customs and border protection website here. Straight from the horses mouth.