The US government's possession of weapons and their use? Well, of course they needed all those weapons. How else could the wars be fought?
Guns in hands of government are a completely different issue than guns in the hands of citizens. You do see that, don't you? Government knows what to do with guns. Kill people. Lots of people. Citizens with guns are clueless and have to be dealt with..
US-government 24/7 surveillance of every US citizen? Again, no problem. No indication of bad intent at all. It's just protection against terrorism.