Allowing the federal government broad authority to declare professed religions as ‘not actually religions’ is about the stupidest way I can think of to handle Islam.
I think (correct me if I’m wrong) that the people behind Gates of Vienna are Europeans. If they were more familiar with our government, the steady erosion of constitutional rights via judicial activism and the hostility of the elites to the Christian faith, they’d know that 99 times out of 100, any such power would be used against Christians, not Muslims.
The Constitution is in a sorry state as it is. Conservatism is about shoring up what’s left of it, maybe restoring it as far as we can to its original state (hope springs eternal). I leave poking holes in the Constitution to expand state power to the other side.