Philip Mendes and Nick Dyrenfurth make sense in this article published in today's Australian - Racism risk in calls for Israeli boycott.
If anything, Israeli actions are far less brutal than the behaviour of China in Tibet, the US during Vietnam, Indonesia in Aceh and formerly East Timor, and Russia in Chechnya. This is to say nothing of the persecution of minority racial or religious groups within Zimbabwe, Sudan, Iran, Rwanda and elsewhere. But no proposals have been made to boycott all academics within these countries. Nor is there any plan to boycott Palestinian or Arab academics who endorse suicide bombings and other violent attacks on Israeli civilians.
Despite their logic, I don't expect it will take long for the ideologues like Loewenstein et al to do what they do best - whine an raise unsubstantiated allegations of Israeli misdeeds while they sweep under the carpet any semblance of Palestinian racism and their threats to destroy the Jewish State and murder its Jewish population. I'll give them a day or two.