The Soviet Union was against all religions, including all Christian denominations, including the largest one, the Orthodox, and Protestant America lost many lives and much wealth defeating the Soviet Union over a 75 year period.
“Marxist–Leninist atheism has consistently advocated the control, suppression, and elimination of religion. Within about a year of the revolution, the state expropriated all church property, including the churches themselves, and in the period from 1922 to 1926, 28 Russian Orthodox bishops and more than 1,200 (Orthodox) priests were killed. Many more were persecuted.
Christians belonged to various churches: Orthodox (which had the largest number of followers), Catholic, and Baptist and various other Protestant denominations. The majority of the Muslims in the Soviet Union were Sunni. Judaism also had many followers. Other religions, practiced by a small number of believers, included Buddhism and Shamanism.”
Mexico was almost 100% Catholic, and everything to the south of Mexico was Catholic, countries of 95% and more Catholic, even countries where law required the leaders to be Catholic.
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.