If Israel did the inconceivable, and built gas chambers and crematoria to murder all the Palestinians, the US would never join a boycott against her. The government of Israel is well aware of this fact, and can safely make policy on that assumption. It would be far more likely that we would boycott the EU, which we have done before, effectively, with the Smoot Hawley tariff.
Anyway I am consistent. I oppose with ever fiber of my being genocide or mass ethnic cleansing anywhere on this planet. I don't think I am ideosyncratic in my sentiments.
Hmmmmmm, sure looks like Israel is trying to stay within it's alloted territory, even if they annex the "occupied territories".