Alfie Kohn a species of Marxist

I have finished reading Kohn's book, and looked into some of his earlier work. The Case Against Standardized Testing is actually a book which attacks the notion of choice and judgement neccesary to make choices. Kohn doesn't want us testing (or grading) because he doesn't want us to be able to compare students, teachers, or schools. The reason we ultimatly must not compare is because if we were to excercise such judgement we might choose to alter the schools, teachers, or classes for our students. Doing so implies adding market principles to schools, first through vouchers or other forms of choice (charter schools), and ultimatly perhaps privatization. It is privatization that earns Kohn's greatest hostility, because of the corruting influence of profit. Elsewhere, Kohn has attacked the whole idea of incentives, the basis of free market thinking. And so we see that Kohn rejects free market forces like choice and incentive, he attacks profit, and he is a radical egalitarian (another reason not to choose is because choice is false, we are all equal). That makes him a species of Marxist.