This is now all about Judicial overreach.

Trump was elected on a clear platform, and that includes his well-known and not surprising coupling radical Islamism with terrorism. I think most people see the connection. The constitution does not support religious freedom to terrorize.

The Supreme Court must set aside Watson's ruling, and perhaps even chastise him.
Even the democratic supreme court justices must join in a unanimous ruling in favor of the President. Otherwise the US will have a real constitutional crises, perhaps even the beginnings of civil war.

Keep in mind that the two other branches of government are Republican. They can gang up on the judiciary and impeach judges. And that is also what democracy is all about. The supreme right of the Elected over the appointed.