Comment by aftbit
Well I don't agree on (1) or (2). I think they are at least attempting to degrade the capabilities of Hezbollah, which is designated as a terrorist organization by the US and others. I don't really want to get into the depths of Arab/Israel conflicts as I don't think anyone really has a good solution to that, certainly not me.
However, I do find anti-BDS laws very hard to justify. It seems that many conflate antizionism with antisemitism, probably because some of the most vocal people are actually just dogwhistling against Jews in general. However, there is a large contingent of people, especially in the West, who are opposed to Israel's battlefield tactics and the current conflict, while simultaneously believing that Israel has a right to exist and defend themselves. Those people might reasonably decide that they want to boycott Israel or Israeli products to make their views heard (hit them in the pocketbook), but are prohibited from expressing themselves by these laws.
Are they unconstitutional in the US? One would imagine that if the Citizens United case says that money is speech, that would equally apply to people who want to boycott Israel. After all, we already tolerate much worse forms of antisemtic speech here. Why would we not also tolerate people voting with their money?