It's strange - if we're so confident that our ideology is superior then wouldn't we welcome a small neighbor on our doorstep trying something different as a sort of experiment expected to reaffirm our views? Celebrate them the way you might a silly child, occasionally support them, all while pointing to them as an example of why we don't do what they're doing.
Unless of course we fear they might succeed.
We interfered with Cuba when they acquired nuclear missiles aimed at the US.
Cube prevents its citizens from leaving.