The Bibi quote in this context is especially helpful:

Ethiopian immigrants weren’t allowed to enter Israel if they didn’t take a shot that, unbeknownst to them, would affect their birthrate in the country (a 50% decline) for years to come.

[...]

Many rabbis and prominent figures within Israel have also justified the sterilization by questioning the Jewishness of Ethiopian Jews, in which long-reigning Prime Minister Benjamin Netanyahu chimed in by saying Black Jews in Israel “‘threaten our existence as a Jewish and democratic state.'”