Actually sending in troops to protect Assad will show the world what a threat Iran really is to the entire region and even more reason why they cannot be allowed to get nukes. The good bit if they do send troops is the rebels are going to shoot at them and those poor old elite revolutionary guard soldiers will get killed and they of course will be shooting at the rebels who are no friend of Israel so nobody in Israel will be mourning their loss especially as they don't like us much either. The longer this war goes on for Israel at least the better because all its enemies are killing each other, wasting weapons once aimed at Israel on fellow syrians and the more of Syria is destroyed and the more trouble the economy gets into the better because its more things for them to worry about when things finally do end so they have more important things to deal with other than the Zionist entity. Opening a Golan front well that will make Hezbollah fighters target practice. Unlike in Lebanon in the Golan Hezbollah has no underground arms dumps and there is nowhere to hide because its all open country. They will be easy pickings for Israeli tanks and jets. If Iran was stupid enough to actually send soldiers or aircraft to the Golan it would also be a suicide mission, they will be in an area controlled by Israel. The Merkavas are better than anything Iranians have if they tried to use fighter jets the IAF could deal with them and Israel could quite easily place anti aircraft systems in the Golan so thats one are where there are no problems. Its actually better if the UN peace keeper leave anyway they have no muscle to get anything done and if Israel does need to get involved they will just be in the way and they might try get the UN to look for new resolutions banning Israel to send troops into what is supposed to be a demilitarised but Assad has been sending troops in there.