First, before liberals rush in to claim that BDS is not anti-Jew but merely anti-Israel, know that BDS has indeed been recognized as an antisemitic movement. (Links below.)
Now, given that BDS provides an outlet for antisemites to express their Jew-hatred as well as actively promoting it, the question is: Why do liberal Jews support a major antisemitic movement?
My theory is they, like all liberals, divide people (as groups) into “oppressed” and “oppressors.” That is why you see liberals race in to defend blacks, gays, illegal aliens (and also go soft on criminals), all of whom they see oppressed. And so too with the Palestinians (who elected the terrorist Islamic group HAMAS to lead them). Then, on the other side, liberals oppose those they see as “oppressors” - successful business owners, white males, and Christians. Into this group they out Israelis - an advanced and successful group.
Therein lies the dilemma. Do liberals Jews march against their own people, advancing and supporting antisemitism, because a group of them are viewed - mostly by libersls - as oppressors? The answer is YES: their liberalism trumps their Judaism.
The pro-Palestinian movement rejects the move, saying it stands against "all forms of racism".
www.bbc.com