He always believed that America "must stand solidly behind Israel at the UN and other international organizations."
He favors moving America's embassy from Tel Aviv to Jerusalem. Doing so is illegal. In 1947, the UN declared it an international city. It remains so today.
Kerry calls Jerusalem "Israel's indisputable capital." In 1999, he signed a letter criticizing Clinton for not moving America's embassy there.
He co-sponsored the 2003 Syria Accountability and Lebanese Sovereignty Restoration Act.
At the time, he said "we must ensure that Syria does not acquire and distribute additional weapons thereby exasperating tensions in the Middle East, raising potential threats to Israel, and undermining arms control."
The measure was all sticks and no carrots. It combined punitive economic sanctions and diplomatic pressure.
It heightened regional tensions. It banned military and dual use exports to Syria. It was prelude to last year's conflict. Syria likely saw it coming without knowing when.
Kerry opposes Iran's peaceful nuclear program. He calls it "unacceptable." He says it compromises the security of Israel, the region, America, and elsewhere.