Well the way you phrased it sounded like you just thought that they wanted to stick with other jews like how we talk about marrying another White except in their case they literally keep it within families and marry cousins if not closer relatives so they can maintain power while Whites make sure to NOT do that.

The fact that there are only 12 million or so worldwide makes their gene pool even shallower and when combined with the fact that they have shit genes to begin with you see what happens. The only other group close to being as inbred as jews are certain groups of muslims and they're the ones who get all the media attention since jews want to divert attention away from their inbreeding.

Both groups have cost the Whites and Europeans a lot of money because of having to pay for their inbred trash genes that shouldn't exist to begin with.