A complete educational failure on the part of public schools (I'll blame teacher's unions which protect bad teachers and lobby for shortened schedule and COVID closures long after necessary. Also contributing is liberal govt policy requiring all students proceed in learning at the rate of the slowest learners so that nobody feels badly).
You have to be an idiot to accept the premises of socialism and especially communism, and the Left has been busy creating their idiots. They used COVID to the max in that regard as well - these kids are COVID casualties.