Where to start.
Cuba is already a communist country.
The CIA and US govt actors have backed plenty of 'regime change' agendas.
Most recently examples
Ukraine - hello Maiden massacre and Poroshenko installed as a puppet
Eygpt - hello Arab Spring and Morsi installed as a puppet
US - hello Summer of DC riots and J6 to take out Trump & a failed redo of the Maiden massacre at Lafayette Sq.
If you think there is good in having the US back any 'regime change' you should look into who they plan to 'install' and the agenda behind backing it.
It is NOT altruistic in the least bit.
Isn't he Castro brother getting old too?
Who do they want in charge?