And it's not just the Jews who do this population-swapping and -mixing to make their slaves less likely to revolt. The Babylonians did it too, forcing populations from diverse regions to migrate and live together in the same territory. This makes revolutions far less likely.
Having a high-trust society of people whose heritage, culture, genetics, and values are very closely aligned makes overthrowing an oppressor orders of magnitude easier. And the oppressors know that.