It seems obvious to me that Jews make an ideal scapegoat for any country experiencing social, economic, or political difficulties. The reason for this is twofold. First of all, there is hardly a country in the world that does not have a Jewish segment in the population. And secondly, wherever Jews reside, they are a minority of the population, and a small minority at that, so that they are not powerful enough to defend themselves against a mass attack. It is very easy for governments to divert attention from their own mistakes by blaming Jews for this or that political theory, such as communism or socialism.
For instance, after the First World War, many Germans accused the Jews first of starting the war and then of losing it. This is nothing new, of course. Throughout history, Jews have been accused of all sorts of treachery, such as poisoning water wells or murdering children as religious sacrifices. Much of this can be attributed to jealousy, because, despite the fact that Jewish people have always been thinly populated in various countries, they have always had a disproportionate number of outstanding public figures.