You can sanction litigants for making frivolous legal claims. I wonder: Assuming Tennessee passes its patently unconstitutional proposed ban on Shariah law, would that extend to any state defense of the law in court?
I mean, talk about your slam-dunks under the First Amendment. This baby not only is sect-discriminatory (a major constitutional no-no), but it directly criminalizes religious belief. You couldn't come up with an easier case if you tried. Indeed, you couldn't have a Free Exercise clause that didn't strike down this law.