Protestant America did not defeat the Soviet Union over a 75 year period. Americans helped the Soviet union in the 1930’s. The Roosevelt Administration was very pro Soviet.
After WWII the anti-communists in our government were persecuted and forced out. MacArthur, Forestall, Joseph McCarthy, Richard Nixon and many others had their careers destroyed for standing up to Communists.
Truman was a pro-Communist and allowed the Soviet Empire to expand. His administration sabotaged Gen. MacArthur and American troops.
Politicians in Washington gave Soviets American weapons, technology and secrets. In the 1970’s under detente they financed the failed Soviet economy and protected it from collapse. Only Reagan worked to undermine Soviet evil empire. Lech Walesa, Pope John Paul and others helped bring about the downfall.
We fought in Russia, we fought in China, and we fought in Vietnam, we fought in Korea, and all over the world.
We did defeat the Soviet Union over a 75 year period regardless of what you think, and it cost us dearly.