A surprising BDS development

I noticed looking through recent posts on Mondoweiss that Judith Butler has come out in favor of BDS against Israel. This surprised me because my impression was that most self described "liberal" and "leftist" academics in the US including Michael Walzer, Alan Dershowitz, Claire Potter, and others have been strongly opposed to any sanctions against Israel. So Butler's break with the rest of her colleagues appears to be significant in that she appears to be one of the very few hip and trendy left wing US academics to take a public stand in favor of boycotting Israeli academic institutions. Does anybody have any information on this?