Representative Ilhan Omar is not a vicious antisemite, she is one of few good things about Congress. But she was wrong to suggest this week that America only supports Israel because a powerful lobby buys off US politicians. The American state needs no conspiracy or blackmail to encourage it to do damage around the world. When Democrats dissent on foreign policy, they usually insist that America is a gorgeous dream poorly applied by foolish leaders. Since her election last year, Omar has opened the door to a different, taboo argument. Her interventions over Venezuela and the southern border broke from the Democratic script and caused controversy by hinting that the aims and not only the means pursued by the American state frustrate the achievement of human freedom. By endorsing the global Boycotts, Divestment and Sanctions (BDS) movement against Israel, Omar moved well beyond those Americans who criticize Benjamin Netanyahu's excesses confident that Israel, their old ally, remains a noble endeavor now in need of ... counsel from Washington. There is an important Israel lobby in America, and it does a great deal of harm: America's biggest pro-Israel lobby group is ... Christians United for Israel (CUFI). The lobby makes a just peace harder, and we should not fear condemning it; Democrats lining up to suggest even mentioning it is intrinsically antisemitic show just how cynically, how dangerously Israel's supporters sometimes see antisemitism as cheap political football.