Monotheism is belief there is only 1 god
They had signed a treaty. However they did very little to act in concert with one another during the war. Each country had different goals that did not mesh well enough to force them both to come together in formulating a combined strategy. They were referred to as the Axis Powers.
the sons of liberty used it as leverage and overdramatized it to get more people to join their cause, calling it a massacre and saying that the men were ordered to fire when they weren't
The Warsaw ghetto was the largest Jewish ghetto during World War 2. The Germans made all the Jews move into that ghetto and provided them with minimal food, and many people died because of starvation.