Unless I’m confused, the issue is not whether Cuba has been naughty.
It’s whether: A. sanctions have proven to be effective at modifying Cuban behavior; and B. whether Cuba has done anything that multiple other countries with which we’ve long had “normal” relations have not also done.
That said, the US has long been the only country imposing sanctions on Cuba, so it’s not exactly like they’ve been cut off from the world.
Raul Castro and his daughter's recent comments demonstrate that Cuban has no intention of changing it's policies or modifying it's behavior.
The only option is keeping our boots on Cuba's throat to keep them down physically and economically too weak to do any damage