BERLIN (Reuters) - Syrian President Bashar al-Assad is to blame for the civil war engulfing his country and the West should **t talk to him just because Islamic State (IS) is "even worse", German Chancellor Angela Merkel's foreign policy adviser said on Tuesday. IS militants have seized swathes of territory in both Syria and Iraq and a U.S-led coalition is targeting them in air strikes, providing some respite for Assad's forces and prompting some to suggest a possible rapprochement with the president. ...