The Bill of Rights was written for US Citizens, it was later debated if Non-Citizens inside the US are protected under the Constitution, due process, illegal search et al. Even that has been redefined sine 9/11.
You're putting the cart before the horse.... Once admitted, Yes, no one is going to stop them from exercising their religious rights but we don't have to admit them or anybody.
Which brings me to the obvious question, how can Government stop someone from exercising a religion, yet they stop Christians from exercising theirs all the time.
I guarantee no one would dare stop a School from a public display of a Muslim or any other (non- Christian) religious prayer or icon.
Wrong, Trump said he not allow any Muslims entry to the US. So if you are a Muslim and are a US citizen, and you want to make the pilgrimage to Mecca, according to Trump, he will not re-admit you to the US.
Second of all, we ban them from coming in. What are you going to do with Muslim's who are already here? Aren't they supposed to be just as dangerous? The one shooter was a US citizen, the other guy was a Major in the army.
You have to love Christians. If you say Happy Holidays to them, they are deeply offended and talk about a 'War on Christmas' and cite religious freedom. They then turn around and try to ban an entire religion with 1 billion followers from the United States.