On more than 30 occasions, the United Nations Assembly has discussed the blockade against Cuba, which costs the island 5 billion dollars annually, according to some estimates. Every year the resolution is proposed and the whole world, through the vote of the absolute majority of the member countries of the United Nations General Assembly, has condemned the imperialist attitude of the United States towards Cuba.
Seems like he was executed for leading a rebellion against Castro’s forces. It wasn’t just because he wasn’t communist enough.
He was charged with planning to lead them, though I’m not sure if that was actually true or just a charge to slap on him before the execution. He did smuggle arms for the counter-revolutionaries, but only after his comrades and friends were being arrested for counter-revolutionary activities.