I believe this is unconstitutional. For example, it isn't a crime to vote for something patriots believe is unamerican. In fact, our government can be changed totally through constitutional amendments -- as well it should be able to do.
It's not that we haven't deported communists that has led us to the point where they dominate our universities and corrupt us through the arts.
It's that we gave them tenure, bought their musical recordings, went to their movies, and elected them to office. I believe we must face the responsibility for our own mistakes. I see it turning around, and it's happening without any thought police. (I think the thought police are the soccer moms and PC types.)
This gives me the chance to point out that it's people on the right these days who are the strongest defenders of liberty. They stand up for the second amendment. They stand up for freedom of speech. They offer their children as soldiers. They lead us to fight our enemies.
We can have freedom in this country and honor the Constitution at the same time.
Problem is, outside of country music, there are damned few non-leftists recording music. Maybe there are some non-left-wingers among the Electric Celt/Acid Croft/Celtic Stone/AfroCelt sort of music I like, but they're keeping quiet about it.
That's my attitude, anyway. But of course I'm not a Constitutional lawyer and I'm also not in the position to deport anyone. Regrettably.