I'm sure you will tell us exactly what is going on. Make it easy, copy and paste from conspiracy websites.
Assad used chemical weapons dozens of times during this war. It was proven by international inspectors that he had factory and storages of poisonous gas. It is nothing new to be surprised. Stop inventing parallel universe dude.
mhm and you know who also used chemical weapons during this war? rebel groups. and this was also proven.
but sure i got all my info from "conspiracy" websites? just google "dschaisch al-islam" or "army of islam".
https://en.wikipedia.org/wiki/Jaysh_al-Islam#Alleged_use_of_chemical_weapons
look up how many % of the rebels are jihadists and islamists. it was estimated at 60% a few years ago. we have no idea who used chemical weapons and we have no idea who is the good or at least the "better" side. the best thing imo is that the west accepts assad as leader of syria at least for now and stops turkey from attacking the kurds. its better to have assad in syria than islamist groups.