No. Humans are not perfect moral reasoners; if he booted up a Friendly superintelligence and it mentioned black people, should a racist conclude he screwed up?

It's unlikely, to my mind, that the arguments presented by the OP are correct - but they are not trivially false. There are people who already espouse similar views; hell, there are people who believe we should all commit suicide now, to spare future generations the pain of living. To simply say "I don't want to do that" is a fully general counteragument, and if it was properly integrated you would be immune to any moral argument.

(You would also have to conclude that everyone but you has a wildly different utility function, which would rather defeat the purpose of CEV.)