On balance, this is more political that religious, and folks’ POVs will tend to divide along political lines. So I moved it to the Left vs. Right forum.
On balance, I tend to agree with what ConLib posted earlier. If Muslims try to demand enclaves where Sharia has legal force, the Federal, state and local (as applicable) MUST be a firm, “No!” This is what is being tried, and some nations (Norway? Sweden?) have been foolish enough to permit it. It leads toward areas in cities or entire cities where non-Muslims and LEOs are not safe (let alone able to enforce the law, in the case of the latter).
But an absolute ban on immigrants who happen to be Muslim, no. Nor should being a Muslim be regarded in law either as a basis for suspicion or as mitigating in criminal matters (or court hostility or special treatment in civil matters). You know … kind of like they’re … human beings.