Before examining that, however, let's retire one particularly tired and self-contradictory "argument" against U.S. policy toward Cuba: The embargo is a convenient "excuse" for the Castro regime's failures.
At the minimal risk that a generalization like this creates, nobody who believes in (or at the very least understands) capitalism still holds that Cuba is an economic sinkhole because of U.S. foreign policy. As such, it is foolish to claim that the embargo is an "excuse" for the Castro regime's economic failure. This argument shifts blame to the Cuban people, for their implied stupidity. No émigré I've ever met believes their hardship resulted from U.S. policy. The embargo is an "excuse" only to the Left, for whose intellectual shortcomings I make no defense.
Everyone in Havana knows they receive one bar of soap per month because of decisions made by Castro, not Washington. To argue otherwise is to deny the Cuban people an "insight" most Americans take as common sense.
The most recent way to blame the United States for Castro's brutality is by criticizing the actions of the U.S. diplomatic mission in Havana. The argument goes that were it not for U.S. diplomats-invariably portrayed by the media and the Left (quibble, quibble) in C.I.A.-like terms-supporting pro-democracy forces in Cuba, Castro wouldn't have to hand out life sentences like candy.
This is an insidious form of blaming the victim, along the lines of a domestic abuse counselor inquiring, "Why didn't you stop complaining after your husband hit you the first time?"
If only those pesky Cubans didn't want freedom so badly and the U.S. government wasn't so willing to help them, Castro wouldn't have to play the stern father.
What appears to be an attack on American actions turns out to be a much harsher attack on those who support American values from abroad. Imagine blaming the Berlin Wall jumpers for forcing the guards to pick them off like tin ducks in a carnival.
Moral relativism is a valued tradition for the Left, but some on the Right also equate a principled policy decision with the type of restrictions on freedom implemented by Castro.***