It was the Soviets who arrived in Berlin much before the Americans did.
It was the Soviets who made Hitler commit suicide and surrender.
I have always wondered: were the Americans fighting against us, or against the Soviets in WW2?
I mean...we welcomed them and signed the armistice immediately.
Sometimes I think Hitler was maneuvered by some shady élites overseas to fight against the Soviets on America's behalf.
At first, I think most Americans wanted to stay out of WW2. After the fall of France in 1940, it appeared that balance of power was shifting more lopsidedly in favor of Germany - and that did start to worry more Americans.
Up until that point, the only countries with strong enough navies and projection power to threaten the United States were Britain and France, but we established good relations and trade ties with those countries. If Germany had displaced them to become the new hegemonic power in Europe, then that was an unknown risk that worried many Americans. But the greater worry at the time was Japan and growing concerns about their forays on the Asian mainland and potential threat to U.S. possessions and other Western interests in the region.
Communism was viewed more as an ideological and internal security threat, as neither the USSR nor the Communist Chinese (who were still locked in civil war with the Nationalist Chinese) had the military wherewithal to threaten the U.S. It wasn't until they started to become more powerful militarily that the U.S. made them a higher priority.
The U.S. was in the most favorable position after WW2, as our industries and infrastructure were virtually untouched and our military losses were much less than what other countries faced. Europe was devastated and on her knees. Japan was crushed and starving. China was still in turmoil and in the grips of civil war. Russia was victorious, but facing severe manpower shortages - and it would take years to rebuild and recover. It was also clear that it was the beginning of the end for the British and French colonial empires. But the U.S. remained a strong, viable military and industrial powerhouse.
However, despite being in a strong position like that, one of the weakest links and least competent part of the U.S. government was the State Department. Ambassadorships were typically handed out as political rewards for major donors or friends. One thing I recall was that, when the Tehran Conference took place in 1943, nobody in the State Department knew anything about Iran. The U.S. had to rely upon the British and the Russians for information and guidance because our people knew nothing. (I guess we learned quickly, since 10 years later, we helped install the Shah in power.)
Another funny example was when an American delegation wanted to meet with Mao and his leaders, in order to gain their cooperation with the Nationalist Chinese against Japan. One of the Americans who was in the delegation was a bit of boorish clod who kept calling Mao, "Mousie Dung." These were the kinds of people who were involved in the diplomatic structure, and who made decisions and passed on information which was used to formulate the US government's perceptions about the world around them.
As a result, U.S. foreign policy has been not unlike the Three Stooges cluelessly stumbling and bumbling around from one hornets' nest to the next. All these things just kept happening and we didn't know why or what to do about it. Korea, Vietnam, Iran, Iraq, etc. All these crises and wars just kept "breaking out" like random brush fires without any rhyme or reason. Or they might attribute it to Satan, Sith Lords, Evil Empires, Axes of Evil - turning US policy into some kind of melodramatic comic book plot.