Because in America, that statement is so heretical and antithetical to what the average American thinks America is, that most people probably wouldn't even be mad at you for saying it: They'd think you were legitimately unwell/insane.
It's on the same level as saying "I hate liberals and am not conservative".
'The Communists disdain to conceal their views and aims. They openly declare that their ends can be attained only by the forcible overthrow of all existing social conditions." - Manifesto
Yeah and Fidel managed to get a revolution going by actually concealing his aims
Didn't he have nationalist motives at first then got into Communism when America flipped out at him
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