There's no moral equivalence between China's totalitarianism and the U.S. China is worse by orders of magnitude both in degree and kind.
Comparing the two is just an excuse to do nothing.
In the meantime, feel free (pun intended) to protest misdeeds by the U.S., vote for new leaders, organize with like-minded individuals, or buy weapons.
(Aside: many people feel like buying weapons is completely futile against oppression. But it reduces your dependence on the government for protection, and makes it harder for the federal government to convince local police to carry out their dirty work. Also, really bad governments never seem to want citizens to be armed, so perhaps there's a reason for that.)
Meta: I think the rhetoric of humility is more powerful here.
"We are not perfect, but we can't stand by. We have sins of our own that we are trying to rectify, but we cannot allow what you're doing."
The flaw in mutual criticism without admission of guilt is that saying "we're good" even in comparison is so obviously self-serving that it gives your opponent a trivial excuse to dismiss you.
Americans are admitting our flaws, constantly. And when we do that, we don't compare ourselves to China to divert the issue. But debates about China always end up with this diversion into US flaws.
Comparing the two is just an excuse to do nothing.
In the meantime, feel free (pun intended) to protest misdeeds by the U.S., vote for new leaders, organize with like-minded individuals, or buy weapons.
(Aside: many people feel like buying weapons is completely futile against oppression. But it reduces your dependence on the government for protection, and makes it harder for the federal government to convince local police to carry out their dirty work. Also, really bad governments never seem to want citizens to be armed, so perhaps there's a reason for that.)