Reasonable Atheist said:
"Terrorists" exist for a reason, and that reason is there is no other way for them to fight back.
America is so bad you feel the need to sympathize with al-Qaeda, Hezbollah, ISIL?
Consider this:
The reason our military is so big, is because NATO has allowed the EU to outsource its military resources to the United States. We enable your lives to be peaceful, your defense spending to be small, and your domestic spending on healthcare, etc. to be prudent. We have aircraft carriers, so that former naval powers in Western Europe no longer have to. We keep bombers in the air 24/7, so that you don't have to. We build counter-missile installations in your countries, so you don't have to. A clandestine network of spy satellites launched by our covert space program keeps tabs on everybody, everybody including a subset of nations whose actions would threaten your own security, be it economic or territorial, far more than we ever would.
One might beg the question: "without the US and Russian cold war, nuclear annihilation would never have been a threat in the first place!". The genie cannot be put back in the bottle. History cannot be rolled back for a do over. The world we live in has nukes now.
Does China mind our containment of Russia or North Korea? No.
They might mind our increased presence in the Pacific, but to be frank, it's only to sabre rattle at them for attempting to claim chunks of the South China Sea (an extremely large area) that belong to other sovereign nations, like Japan, who also does not mind utilizing our military for their security.
Has the United States made mistakes?
Sure.
Our wars in Afghanistan and Iraq haven't been fruitful. Arming insurgents to fight the Soviets bit us in the ass, but also allowed Afghanistan to live up to its name as "the graveyard of empires". We made a gamble that future terrorism would be less harmful than the continuation of the Soviet state, and we were right. Chechnya also helped, and I don't doubt that we had a hand in that either. Occupying Afghanistan was our mistake, but hunting al-Qaeda there was not.
I have no justification for the war in Iraq, other than destabilizing the region to place power into a reforming Iran's hands while proving that Israel could be tempered. Look up the Samson Option, if you think we're the only crazy ones. Getting Israel to stop feeling threatened enough to potentially kill us all is definitely part of the chess strategy.
If you have any delusions of a kumbayah world, you should lose them now. Everything, including economics, is war by other means. Humanity has never not been in a state of war, and as long as resources are few and ideologies are in conflict, it will continue. Be glad that you are part of the hegemony, and not its enemy.
The real question is, would you rather China, or Russia, or India have geopolitical dominance? Do you miss the British Empire? Or the French? Or the Spanish?