The video of the second change to the 2012 DNC Party Platform is a must-watch if you haven't already seen it:
So, why did DNC change the platform the first time so as to remove certain language about Israel? From time marker 0:26-0:60, the CNN video below offers a clue (hat tip to Will of MFS - The Other News):
There is more to the story of the language in the 2012 DNC Party Platform. From Debbie of Right Truth:
After DNC delegates denying God (and Israel) three times, they still got their way in the end. Breitbart reports that full pro-Israel language from the 2008 platform has not been and will not be restored...Check out the entirety of Debbie's post HERE. Worth your time if you are interested in this topic.