His analysis of jewish traits and pathologies/methods is excellent, until he goes back into the Old Testament and tries to use the Yahweh-ordered genocides of Caananites..etc..as proof that "jews are genocidal".
I'm going to suggest no one here would refuse to keep a diamond they found in a dunghill.
MacDonald's expertise is not the OT. Like you say, "His analysis of jewish traits and pathologies/methods is excellent..." I may go to an excellent mechanic to maintain my Ferrari, but if he started telling me about economics, my field, I'd take what he said with a smile, thank him for his excellent care of my car, pay the bill and drive away, happy.