[hlmencken3]

http://www.timesofisrael.com/us-jews-among-the-most-supportive-of-gay-marriage/

http://www.jta.org/2013/07/29/news-opinion/the-telegraph/poll-jews-support-abortion

[Mastador1]

they overwhelmingly support

A very definitive statement and I don't believe there has been any poll or anything else that can be used to verify it, no matter how many articles in liberal press you point to.