This is a dangerous thing to say publicly! As you mention yourself, the United States has had red scares just a generation ago. Who is to say it won't happen again? And that is exactly why you should support freedom of speech and tolerance of differing ideologies. Or the next red scare will be even worse.
>statues of Lenin and Stalin were removed without much second thought, only USians would keep statues of their (war criminals)|(rebels) for 150 years.
As far as I know most of the USSR world war 2 monuments are still standinding. The US is removing even monuments to soldiers that don't feature any specific general or leader. By your logic we should tear down the famous Vietnam war memorial because the US lost the war.