One simple reason. He didn't allow Pollard to go to his Father's funeral, and recite the Kaddish at his grave. That one event should resonate with any decent person. No Jew should vote for the worst President of out time, for this one event alone. Anyone is better than this creep.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: White House rejects President Peres’ plea to release Pollard