Assad has used chemical weapons consistently, deliberately, and with a conscious consideration of their qualitative effects
John Bew and Shiraz Maher write: Assad has not simply eroded what academics call “the chemical weapons taboo”; he has shattered it. And his confidence has returned, especially compared to the high watermark of the war in 2014-15, when his authority had crumbled. Kurds dominated the north-east of Syria, while broader parts of the east had fallen to Islamic State. Meanwhile, an alphabet soup of various militias – jihadist and otherwise – rampaged across northern and southern parts of the…