Israel invaded Syria and occuppied the Golan in 1967. This was a blatantly illegal land grab that has not been recognized by any nation in the world. Syria has taken the extra step for peace by offering a comprehensive settlement with a large demilitarized park in the Golan, addressing Israeli security worries. Israel scorns peace with Syria. Syria has every right to take the Golan back by force. It's their land, recognized as such by every country in the world bar Israel. If Israel continues to refuse to negotiate, they should.
U.S., allies conduct 20 air strikes in Syria and Iraq against ISIS, says U.S. military (Reuters)
from the article: Israel's message in talks with Gates: Syria is preparing for war