This is exactly the problem. Americans see their own country as perfect example of freedom and liberty, and the idea that they might be wrong never crosses their minds. When you try to explain to them that their culture has elements actively hostile to personal freedom, you get a syntax error at best.
One of the things that Trump is doing is pointing to general "wokeness", "cancel culture", and so on, and labeling them as censorship. The trick is that he's not exactly wrong. Most Americans have their entire livehoods tied to their employers, which usually are emotionless corporations that can fire said Americans at will. This means that, if you express an undesirable opinion, you can and will be fired, and self-censorship is a vital element of American culture. Many Americans celebrated this as a feature that allowed them to maintain social cohesion. Now that the tide has shifted and the list of socially acceptable opinions has changed, same Americans are suddenly very upset because they cannot voice their opinions.
It's not that Americans suddenly stopped valuing freedom and liberty. They never did, but you never noticed, because you never tried to cross the boundary. You can interpret this in two ways - either be sad that your vision of America isn't real, or be happy that for all bad things that Trump is doing, it's not a fundamental change in American society.