I am unaware of Jon Lee Anderson referring to Che Detractors as "useful idiots" or anything similar.  He is a reporter and scholar and does not revert to sophmorish partisan insults or extreme hyperbole. Also yes it matters that he wrote the definitive 800 page biography ... which is a far cry from a short 200 pg Cuban exile rant with very little sourcing - which is what Fontova's drivel is.    TR