The US does have a track record of being blase about its officers of the peace killing people in the streets, for example. The US has fantastic freedom of speech and expression, but it also sends SWAT teams into peoples' houses and cheers the purchase of tanks for its police departments. Similarly, police can legally just take your money if they feel like it.
Yes, the US is not as bad as China as a place to live (look at the migration flow between them for simple proof), but it's worth noting that the same way people explain away the US's flaws can be done in other countries as well.
I believe you're unfairly characterizing the US being "blase about its officers of the peace killing people in the streets" there were approximately 990 people killed by police in 2015 and 2016. In a country of 325M with the focus on highly dense urban areas. In a particular segment that constitutes less than a quarter of those deaths there has been heavy rioting and police officers hunted and murdered as a result.
And you say riots and police being hunted? There is violent unrest in China, too. In both the US and China, the middle-class and the folks in power just hand-wave away the concerns of the victimised demographics, finding excuses for the state's poor treatment of them.
As many people are mocking and blocking #blacklivesmatter as are supporting it. What are those in power actually doing in response to the upset demographics in the US? Hot air. Nada. Zilch. Zip. Nothing with any real bite. Hence, blase.
Yes, the US is not as bad as China as a place to live (look at the migration flow between them for simple proof), but it's worth noting that the same way people explain away the US's flaws can be done in other countries as well.