High concentration isopropanol is also used in what's likely the most efficient method (at least where back yard chemistry is the only option) to produce hashish from large quantities of marijuana. It allows for quick processing into a much more condense, potent, less-perishable and comparibly easy to transport/smuggle product. Just a thought on what other Syrian industries[1] might demand such large amounts of isopropanol. Considering the large quantities, maybe some Syrians have been enlightened by a more efficient way to concentrate their vast supply of low-grade marijuana.

[1]https://m.gulfnews.com/news/mena/syria/amid-war-in-syria-has...