Neither of his parents were American citizens, unlike Senator Cruz, so far as I can tell from researching it. How do you figure he’s eligible?
his mother was an American citizen
Although Bibi Netanyahu was born in Israel, he was an American citizen at birth as his mother was an American citizen. He grew up in in Pennsylvania, graduated from high school there, and then earned a degree from MIT. Israeli law states that in order to serve in the Knesset, a member cannot hold dual citizenship, and Netanyahu then gave up his American citizenship; however, according to my quick, by no means exhaustive research, under American law Bibi is still an American citizen.