Why should he play around with losers? Those people who let the west gas them have anyone to blame but themselves.
It's not just the Syrian government using chlorine bombs
This week the rebels did a chemical attack which injured civilians and SAA soldiers. There was a chlorine facility taken by the rebels in 2012.
Also, the mainstream media has remained silent over the rebel offensives into Western Aleppo. They keep talking Mosul which isn't that much different. Their shelling has killed 100 people in just a couple days. The UN Special Envoy has said they're committing g war crimes too.
The rebels are expecting poor people who are trying to leave east Aleppo into the western gift controlled part to pay hundreds of US dollars. They also have executed people who have tried to leave via the humanitarian corridor by the Syrians and Russians. Those who have left gave accounts of the dangers they were living in and confirm the government forces didn't harm them
Sounds like a case of using human shields.