Oh look MP just found out how eggregious Putin and his acolytes are. Good on you!

Of course, this has little to do with how outrageous we in the safe world are. This has everything to do with the geopolitical power that only Assad can provide to the Russians. Never forget the russian naval base in Syria, its largest outside Russia and its door to the Mediterranean. Losing Syria to the Americans and Israelis would mean a free road to them into Iran, and their hegemony in the Middle East.
And it's not as if the westerners want to do anything about it as well. Syria is a mess right now, with multiple oppositions fighting each other, from secularists to islamists, from Sunnis to Shiites, etc. No one wants another visit to the ME hellhole.
So Syria will continue to burn until either Assad gets too tired to fight back and commits a mistake, or the opposition is silenced. This is probably the start of several decades worth of a civil war. Angola is probably the example here. The result will be millions killed and a country shattered to bits. Then, when it will wake up from its nightmare, it will have oil for the Assad family to hoard for themselves.
I'm glad people still get indignated with all this, but I'm really fazed out at it. It's like a cliché movie that I have just seen too many times.