If Syria or Lebanon acquired the S-300 or the S-400 Israel will no longer have control of it's own airspace. In fact Netanyahu is complaining because Saudi Arabia purchasing the S-400 will give it the capability from Saudi to close down Israeli airspace.
Police disperse hundreds in brawl in Kafr Manda, northern Israel (Haaretz)
from the article: Despite Israeli protests, Russia won't halt arms sale to Syria
'I am ashamed that I saw injustice and never did anything about it,' Reinhold Hanning tells German courtroom.01:17 30.04.16 | 1 comments