Because of the rules of the Torah, Jews were reluctant to assimilate into societies. They refused to eat foods given to other gods. They were reluctant to marry foreign women. In short, they stayed out on the fringe. Naturally, it was easy to make them the scapegoat. If you had a plague, it was probably the Jews. Crops failed? Jews. Economy tanked. Guess who, the Jew.
Because they didn’t really assimilate, it was hard to get political loyalty from them. They stood up for the underdog because they knew they were the next underdog. They didn’t as much oppose the government as refuse to walk in locked step.
Hitler used the most common tactic. He blamed them for everything that went wrong. It was easier for the Gentiles to go along with it than do any research and risk reprisals. Anti-Semitism is solely based on the person’s ignorance of the truth and willingness to believe any lie. When you are holding the proverbial hammer, every Jew is not a nail. Every nail is a Jew. It’s just that easy for them. Every bank president is a Jew because you can’t be a bank President unless you are Jew. That’s the way they think.
You summed it up nicely.