Because the MEC regime didn't bother with earning our adversaries' and enemies' respect early on

Senior officials in Syria and Iran say Israel gets it if we let loose with the missiles.  Israelis are taking it seriously.  They're stocking up on gas masks.

Russia and now China warn of "catastrophic" consequences of the West acting without consulting the UN Security Council.

And Saudi senior intelligence official Prince Bandar has offered Russia an odd but disturbing half-extortion-half-bribe scenario if it drops its alliance with Syra.  He says he can make Russia an irreversibly major player on the world oil market, but then adds this:

 [H]e also hinted at Chechen terrorist attacks on Russia’s Winter Olympics in Sochi if there is no accord. “I can give you a guarantee to protect the Winter Olympics next year. The Chechen groups that threaten the security of the games are controlled by us,” he allegedly said.

Prince Bandar went on to say that Chechens operating in Syria were a pressure tool that could be switched on an off. “These groups do not scare us. We use them in the face of the Syrian regime but they will have no role in Syria’s political future.”

When you don't do the right thing early on, doing the right thing late in the day can have unsavory consequences.