Now, what I am going to suggest really reduces Critical Race Theory to its core and does not capture its full depth, here is the way to shut up a dumb fucker when it comes to CRT:

Simply ask the dipshit if he or she believes racism/discrimination is learned or if a person is born that way.  When the idiot replies racism/discrimination is a learned behavior, tell that dipshit that he or she then believes in the core principle of CRT and to shut the fuck up.

(Yes, I know that CRT also proposes that American institutions and law purposely are racist and were created that way and work to maintain White superiority, but it also suggest that race is a social construct).

On a funny-sick note, in the past month's National Geographic (a magazine owned by Rupert Murdoch) it even declared this exact point.