Look at the state of Egypt, Libya after the Arab spring not to mention Iraq. The west was behind the ousting of what was deemed Dictatorship regimes, however Mubarak, Gaddafi and Hussein kept the lid on their respective countries as did Tito with the former Yugoslavia. Syria has a large Christian and Jewish population, if Assad goes then the ethnic cleansing begins I believe. Let the Syrians deal with it and we (The UK and co) keep out.