I don't think this is as true as people would like it to be, Jews have been kicked out of countries a lot and have stuck together through their religion, look at all the Jews who immigrated to America in the early 20th century and were poor, they weren't all bankers and politicians from the get-go.
I don't think there's some great Jewish conspiracy, but I do think that the Jews stick together as a tribe much more than other groups (especially when they are a minority) and will "help the tribe" whenever possible by giving fellow Jews jobs in better places when they can, which has resulted in them consistently climbing upwards in terms of power. This is compared to most other ethnic groups which are encouraged to compete with each other, and fuck each other over instead of sticking together and helping each other as a tribe. I do think that Jews will use their power to hold onto it, but I think that's true of a lot of other groups, but Jews have been able to spread the idea that you are anti-semitic and worthless as a person if you question anything about them that they've been able to rig the game pretty well for themselves. I don't think they are acting malicious or evil or anything, but that's just how I see it.