These missiles don't even matter. They have a limited range, and Israel can easily take them out using an assortment of their long range weaponry. All this weapon sale did was beget more violence, instead of flying over assad's palace, you'll see Israel take out each and every one of these missiles.
U.S. sanctions Russia's state-owned arms exporter Rosoboronexport (Reuters)
from the article: Sharon: Russian missiles being sold to Syria do threaten Israel