1) Radical Islamic groups that, like the Islamic Republic of Iran after the 1979 revolution, regard Israel as the “Little Satan” and America as the “Big Satan.”

2) American revolutionary groups who used to be affiliated with Communism but now call themselves radical socialists or workers parties. Their goal is to overthrow our government and they attach themselves to every disruptive movement in the hope of garnering support and creating distrust for American democracy.

3) Old-fashioned anti-Semites who hate anything associated with Jews and concoct conspiracy theories that blame “the Jews” for all evils.

4) Useful idiots who have little or no knowledge of the issues but march in lockstep with all “woke,” “hard left,” and “anti-colonial” causes on the theory that “if it’s left, it must be right.”

[The usual suspects, especially #4. However, it’s the second group that is the most dangerous, and the most effective at undermining Western institutions. They largely come out of Academia, after having succeeded at undermining that institution over the last 60 years or so. — Ed]