The line taken by most Assadists is that responsibility for the gassing of civilians at Khan Sheikhoun is not established. There is actually considerable verification of responsibility, including the testimony of survivors. But of course residents of Khan Sheikhoun are discredited by claiming they are al-Qaeda & ISIS.
Other Assadists claim the White Helmets murdered children so they could make fake gas attack videos.
Then there are those who claim it is irrelevant who gassed the civilians but are up in arms about the bombing of empty airport hangars.
There isn’t one of these “nuanced” views that stands outside the range of demented.