"Nobody has dialogue with the terrorists. Terrorism has hit the United States and Europe. By any chance, did any of these governments talk to terrorists? One talks with political entities, but not with a terrorist who cuts people's throats, assassinates people and uses chemical weapons," he said, ignoring allegations that his own government has very likely used chemical weapons on Syrian citizens.
The Syrian civil war has uprooted a quarter of the country's civilians, according to the United Nations.
The number of Syrians who have fled the violence has surpassed 1.5 million, the U.N. High Commissioner for Refugees said Friday.
Since the start of 2013 alone, the UNHCR has registered close to 1 million refugees crossing out of the battered nation into other countries, which amounts to about 250,000 people each month.
Along with the refugees, more than 4 million people have been internally displaced.
Syria has a population of just over 22 million, according to the CIA World Factbook.