Thought they did it about then. Does that make it "legal". Depends on your point of view. When France and Britain defined the boundaries of Syria and the Palastinian Mandate around 1923, did that make the boundaries "legal"? Once again, depends on your point of view. How about the Syrian attempt to destroy Israel in 1948? Legal? What about its participation with Egypt and Jordan in the '67 war? the '73 war? Legal? It's support of Hamas? It's support of Hezballah? Is all that legal? Let me know, because Syrians and the Druze in the area all scrupulously adhere to international law, and I'm sure they'd like to hear the answer from you.
Israeli soldier lightly wounded after being hit by car south of Hebron (Haaretz)
from the article: Police arrest fourth suspect in case of espionage against Israel