So it's all been our fault, correct? The Soviet Union and Maoist China only wanted to be left alone to mind their own business? The Islamic terrorists were just noble freedom fighters when they were throwing old men off of cruise ships and murdering Olympic athletes more than forty years ago.
The US has surely made its share of mistakes. Probably the most damaging war this country has ever fought, besides of the civil war, was the Vietnam war. 56,000 dead American soldiers. Many of them drafted against their will and  many of them minorities. All brought to you by Kennedy, Johnson and the democrats.
When we emerged from WWII as the primary superpower of the Free World, other countries looked to us to maintain some sort of balance lest everyone take a one way trip into tyranny. We didn't always get it right and we didn't always align with nice guys. But we have been the main reason these other countries have remained free and prosperous.