As for your inaccurate comparison of Islam to the USSR, not all Russians were Soviet agent; as a matter of fact, if it was not for the will of the Russian people {enabled by Ronald.R} the USSR would still be around.
You like to change the argument when you are wrong. I purposely did not use the word "Russian" in my post. I said "Soviet". I also purposely did not use the word "Communist" because it was technically possible to be a communist or a marxist and believe that the state would whither away peacefully. But a Leninist believed that the people had to help the process, and that is a distinction that merited all avowed Leninists from being allowed to emigrate to this country. Leninists who were born here were allowed to believe whatever tripe they wanted, but if they acted on their beliefs, by, for example, taking part in an organization that actively worked for the overthrow of the government, they could be criminally punished under our laws and the Constitution. Unfortunately, too little of that was done over the decades, and the practice of proscribing that type of behavior has become less common.
But it is legal, and it would also be legal to proscribe membership in an organization that advocates the violent overthrow of our government to be replaced with a theocratic dictatorship, even if that organization calls itself a religion.
My father was born a Muslim in a Muslim land. I know many more Muslims than you, my dhimmi friend. The only Muslim that is a good citizen is not a good Muslim.