On Wednesday, after Israeli forces intercepted a protest flotilla headed to Gaza and brought the participants to an Israeli port, Itamar Ben-Gvir, the Israeli minister of national security, posted a video on social media. The short clip shows the far-right politician taunting the detainees with nationalist slogans as the handcuffed prisoners are forced to kneel. One activist shouts “Free Palestine!” and is pushed to the ground by security personnel. “This is how we receive supporters of terror,” Ben-Gvir posted. The latest provocation by Ben-Gvir proved something that many Israelis have suspected for years: Ben-Gvir is not merely a nightmare for Israeli liberals, but the fulfillment of the fantasies of Israel’s enemies. He provides them with precisely the ammunition they need to argue, time and again, that Israel, in its fight against Hamas and Hezbollah, is the aggressor, and a cruel one at that. Ben-Gvir is a gift to the terrorist groups and the countries that seek Israel’s destruction. The flotilla activists did not actually plan to “break the siege” of Gaza, as they claimed. They …