Complex sentence: On July 29,2011 the movement expressed its support for the social justice protests but disapproved of the heads of the protest which they defined as conscientious objectors and post-Zionist leftists who publicly speak against the IDF soldiers.
Split into simpler sentences: On July 29,2011 the movement expressed its support for the social justice protests but disapproved of the heads of the protest. My Israel defined the leaders as conscientious objectors and post-Zionist leftists who publicly speak against IDF soldiers.