I have no problem with this missile sale, if it of course stays out of the hands of a third party. As to the comments of Israeli overflights; many countries practise this even today, the Russians, the Americans with their U-2's and SR-80's. Don't forget the Syrians also flew over Israel in the 70's, 80's and even in the early 90's, the only difference is that, they didn't return home. As to the comment of having Russian pilots as surrogates for the SAF, I don't think that is such a great idea, just ask the Egyptians what happenned to these same Russian pilots in the early 70's.
North Korea leader Kim Jong Un hails accord with South as landmark (Reuters)
from the article: Sharon: Russian missiles being sold to Syria do threaten Israel