For what I remember, I was taught that ww1 started ww2 and put Germany in a depression because they had to pay for the damages. Hitler became popular after telling the German people he could fix the problem and won. My teachers never mentioned when or why he started rounding up Jews. They just said he was racist and insane. We came up with theories about why he hated them, like his art school was run by them and rejected him/ his dad was a Jew who was abusive to his wife etc. Japan bomed Pearl Harbor and we got involved. All we ever talked about was D Day, concentration camps, the Allies and Russian winter.
We almost never talked about Hitler himself. If you were interested about anything eles evolving ww2 you had to look it up yourself or stay behind with the teacher to have a real discussion. We were pressed for time during class so everything was summarized.
Tbh a lot of the people calling Trump Hitler probably don't know anything about the war other than people being thrown into gas chambers. It's extremely petty and insensitive to comparing the two when you take the time to do research.