It is. We left Cuba, the last time, in 1964. I was 4 years old. My maternal grandmother was a full-press communist and that created a wedge that was never healed.very interesting history first hand
If you dig deep into Castro's motivation, he did first try to enter Cuban politics the right way. He was betrayed by Batista, when Batista took power and ended free elections. By then, between the influence and interests the US had over Cuba, not to mention the influence and power of the Mafia, " . . . United States companies owned about 40 percent of the Cuban sugar lands—almost all the cattle ranches—90 percent of the mines and mineral concessions—80 percent of the utilities—practically all the oil industry—and supplied two-thirds of Cuba's imports."
At one point, President Kenedy noted: "I believe that there is no country in the world including any and all the countries under colonial domination, where economic colonization, humiliation and exploitation were worse than in Cuba, in part owing to my country's policies during the Batista regime. I approved the proclamation which Fidel Castro made in the Sierra Maestra, when he justifiably called for justice and especially yearned to rid Cuba of corruption. I will even go further: to some extent it is as though Batista was the incarnation of a number of sins on the part of the United States. Now we shall have to pay for those sins. In the matter of the Batista regime, I am in agreement with the first Cuban revolutionaries. That is perfectly clear." (New Republic, 14 Dec. 1963, Jean Daniel "Unofficial Envoy: An Historic Report from Two Capitals," page 16)
Because of its location (90 miles from Key West), FL), Cuba was a strategic location for both the US and Russia. From the way I see it, Castro's alliance with Russia, Venezuela, and other socialist/communist countries, was his only option.
Like I said, this is an interesting topic that even I, a Cuban born, do not fully understand.