The boycott, divestment and sanctions movement against Israel rejects a two-state solution and seeks to delegitimize Israel. That's why true progressives oppose BDS.
At the same time, we also support free speech. Americans have the right to buy, or not buy, goods made anywhere in the world and to urge others to do the same. Boycotting is a form of speech. That's why anti-BDS legislation needs to be carefully worded to accomplish its narrowly tailored goals without infringing on constitutionally protected speech.