A boycott might be the final eye-opener for the majority of American Jews still stupid enough to vote for Democrats.
Color me cynical (I hate being this way), but I don't think it will affect enough American Jews who still vote democrat. It's like asking them to cut off a limb, it's so deeply rooted in their psyche and the tentacles reach down so deep in the way they think. It would be like one day waking up and suddenly realizing everything you knew and believed was a lie and the only way something like that would sink in is if the person actually cared enough about finding truth. Imagine though, what a shock that would be.