It was difficult to deliver weapons Bc of the German submarine blowing up American ships
It is much easier to murder than settle differences peacefully.
There is also the issue of wanting power, if some can wipe out a group of people easily, then other races/creeds/nationalities will likely fall into line sooner than later. Hitler and Stalin did this prior, during, and post WW2.
The Black Death inspired a lot of fear because it kills silently and indiscriminately. Since the plague comes from a type of bacteria, it can spread very easily from host to host. The disease is most commonly found in house rats. These house rats are often found in people's houses which made the disease even scarier. It spread throughout the entire world and killing off a huge number of people really fast. This is the terror of the black death.
In October 1973, it broke out the Fourth Arab-Israeli War, best known as the "Yom Kippur War" because the Arab countries enemy of Israel took advantage of the Yom Kippur ("Day of Expiation") holiday to launch a triple offensive against Israel. When the war seemed to go well for the Arabs because of the destruction of large numbers or Israeli warplanes, the U.S. resupplied the Israelis and made their losses good turning the outcome of the war to their favor.
The U.S. support of the Israelis in the Yom Kippur War infuriated the Arab oil producing countries who announced an oil embargo against the U.S. The price of crude oil went from 3 dollars per barrel to 12 dollars by the beginning of 1974. Since U.S. people were traditionally used to large cars consuming a lot of gas, since gas had always been cheap, a shortage of gas across the country quickly set in, An unexpected consequence of this gas shortage in the U.S., fuel-efficient cars of Japanese make began to become popular in the U.S., and it also forced the U.S. car industry to design smaller cars and fuel-efficient engines to compete with the Japanese car industry.
