I don't have much to add on the substance of the AALS boycott: I agree with Monroe Freedman that these things are a matter of taste, based, I think, on one's subjective sense of what ideas or causes are "beyond the pale" and the subjective value of declaring so in public. As a result, there isn't a whole lot to say on the merits. On the other hand, I can say one thing with certainty: Whoever thought up a boycott that requires you to be in San Diego in January but forbids you to attend the panels has a keen sense of how to appeal to the academic mind.