Here are a few facts to consider. There are several types of weapons that Israel defines as “tie breakers” or as “impeding deterrence.” According to Israel, should these weapons reach its enemies, a red line would be crossed. This is true of the transfer of chemical weapons to Hezbollah or the extremist Sunni rebels in Syria. This is true of the transfer of anti-ship P-800 Onyx missiles (also known as Yakhont missiles) or SA-17 or Fateh-110 anti-aircraft missiles to Hezbollah.
Over the past few weeks Israel has proven that its talk about a “red line” will be translated into deeds, despite the considerable risk that such actions could set the whole region ablaze. In most cases, the “red line” involves the transfer of various types of weapons to Hezbollah or terrorist organizations operating from within Syria. In one case, however, the “red line” involves the transfer of weapons to Syria, including such highly accurate anti-aircraft missiles as the S-300 missiles. Though Russia has promised for several years that it would supply Syria with these missiles, it hasn’t, at least so far.