> Should the US be surprised when China enacts similar legislation?
I wouldn't be surprised to see Obama label such an act by China as an "act of war".
I would. Doing that without any follow-up erodes your credibility. And the US is not going to go to war with China.
You seem confused. Watch a few seasons of Homeland and it will all become clear: no matter what atrocities the good guys are doing, they always have good justifications. Which may need to remain secret, just like the proof that NK was involved in the Sony breach, but it's all for the common good.