Alexandretta, which was until then under a French Mandate, joined Turkey in 1939 (after a referendum). Syria gained independence from the French Mandate in 1946. Syria has no legal right to Alexandretta. Similarly, the Brits created a separate country east of the Jordan river, and Israel has no right to it. In any case, since the adoption of the UN Charter which forbids the acquisition of territory by force, Israel is not allowed legally to acquire such territory as in the Golan. It was doable legally before Israel joined the UN in 1949, but not after.
Australian police arrest 5 over shooting 'linked to terrorism' (Reuters)
from the article: Some serious thoughts on Syria