It's not up to the Supreme Court. It's up to the President, whose authority to ban the entry of ANY class of people, for ANY reason, is solidly backed and protected by statute law, historical precedent, and the Constitution.
If the President STILL needs the permission of the courts - even with all that ironclad authority already welded into the system, then we don't actually have an executive branch, and we certainly don't have laws.
You can take that up with Trump who is allowing a local judge to stay his EO.