One likely outcome of the revolution in Syria is the "Afghanistanization" of Syria. This refers to no central government of any strength and many warlords currently running Islamist-type terrorists. What is the difference between Hizbollah getting these weapons and Salafi organizations getting a hold of them. I would suggest that as the endgame gets a little clearer and this type of configuration of terrorists becomes more clear that Israel engage in preemptive strikes against all the high-value Syrian arsenal besides Chemical and Biological weapons.
We want Iran cooperation, not meddling, Gulf Arabs tell Kerry (Reuters)
from the article: Israeli tanks fire into Syria after IDF patrol comes under fire in Golan