Very pertinent... 8 U.S. Code § 1182
“(f) Suspension of entry or imposition of restrictions by President
Whenever the President finds that the entry of any aliens or of any class of aliens into the United States would be detrimental to the interests of the United States, he may by proclamation, and for such period as he shall deem necessary, suspend the entry of all aliens or any class of aliens as immigrants or non-immigrants, or impose on the entry of aliens any restrictions he may deem to be appropriate.”
Passed in 1952.
As for Muslims:..... Any Muslim who espouses support for Sharia Law , would definitely meet this definition, and since they all secretly support Sharia, it’s an undeniable stain on all of islam.
18 U.S. Code § 2384 - Seditious conspiracy
If two or more persons in any State or Territory, or in any place subject to the jurisdiction of the United States, conspire to overthrow, put down, or to destroy by force the Government of the United States, or to levy war against them, or to oppose by force the authority thereof, or by force to prevent, hinder, or delay the execution of any law of the United States, or by force to seize, take, or possess any property of the United States contrary to the authority thereof, they shall each be fined under this title or imprisoned not more than twenty years, or both.”
Provisions that excluded certain classes of immigrants based on their political beliefs were revoked by the Immigration Act of 1990.
It is better to hang your hat on INA: ACT 212 - GENERAL CLASSES OF ALIENS INELIGIBLE TO RECEIVE VISAS AND INELIGIBLE FOR ADMISSION; WAIVERS OF INADMISSIBILLITY