Critical race theory is not a threat to the United States. But it is a threat to the wellbeing, both social and psychological, of all infected by it. Belief in this new species of quasi-religious delusion places the follower into a schizophrenia of being.
At once, they are both oppressed and oppressor according to their imagined level of privilege/victimhood. At once, they are simultaneously the social judge of themselves, a member of the jury deciding the fate of the accused and the accused themselves, according to their degree of privilege/oppression as imagined by themselves and other believers.
The human psyche cannot contend with that level of dissonance while remaining intact. This, presumably, is why proponents of critical race theory manifest something like a hive mind at the collective level; and something approximating one or more clinically significant personality disorders as individuals.
The two are interrelated: the individual absolves himself or herself of their individual guilt by performance of works, something like "hail marys" to wokeness, by signaling their virtue, often by the only means at their disposal --- on social media. In having performed their "holy sacrament" of shaming all perceived "oppressors," they absolve their "original sin" of having been born with the mark of the beast, their "identity." All of it takes the form of something like an exorcism ending with burning someone at the stake. Or, in a more modern (and equally religious sense), a "struggle session" in the at the behest of Mao's so called "cultural revolution." Or de-Kulakization in the Soviet Union.
This phenomenon, to me, is unsurprising. It echoes the absurdities of identity-based political movements in the 20th Century --- all of which have come about in man's effort to replace the values human civilization developed organically (and which are reflected, generally, in the Abrahamic religion) with something secular. The communists tried communism. The fascists tried fascism. The Americans now try critical race theory.
In so many ways, "critical race theory" is nothing more than the fulfillment of Nietzsche's prediction in the Genealogy of Morals (and, to a lesser degree, Thus Spake Zarathustra). At the point in time Nietzsche wrote, man's capacity for reason had developed to the degree that he could both recognize his normative value frameworks as such and self-consciously criticize them. Largely, this developed as the result of the Catholic church's failures throughout Germany and the world to maintain its cultural legitimacy (a trend that continues to this day, albeit in different form). So, the need for an alternative arose.
But the basis of a normative value framework, critical race theory is not. It is the bastard-child offshoot of a praxis between the so called "Frankfurt School" and Marxists. It is a self-defeating cult of despair that extends precisely into the realm of psychosis.