Like ignoring the crimes of Castro while going after gun groups and other conservatives in America?
I guess, depending on your ideology, that might be considered "a ton" of good.
As far as going after Nazis, the movement was defeated in 1945. 99.9% of them or more are DEAD. Anyone who goes after Nazis today, while ignoring the brutal antisemitic nature of the Castro regime, is on a political Jihad against conservatism.
I don't slander John Loftus. Anyone to the right of the Nation Magazine knows he is a political operative for the far left.