When Syria attacked Israel in 1967 it wanted to make Tveria and Haifa part of Israel. And if they had succeeded that would be the case if anything was left of Israel. Well, Syria lost. So now the Golan is part of Israel. In any event the current borders and all previous borders were determined by war and are no more than armistice lines. It is not as if Syria said what was pre 1967 Israel belong to Israel.
Magnitude 6.1 quake hits Panama-Colombia border (Reuters)