USA does not put citizens in reeducation camps for tweeting about their dislike for their leader. China will have you murdered if you agitate enough. The discrepancies in the two countries in how they handle dissent could not be farther apart.
I wish USA's police did not kill so many people. But Obama does not have dissidents executed for their thought crimes. You should be happy you can post open dissent about the USA on a public internet forum. In many countries, such as China, this is a dangerous move.