It was obvious you didn't even know what a barrel bomb was when you started talking about one side having no aircraft. Hence assuming it had to be the government forces or even Russians.
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"Since February 2014 using barrel bombs has been against international law. After that there's been about 100 incidents per year in Syria. None of local factions that oppose Assad have aircraft's. I don't see how opposition creates 100 false flag attacks without tools needed for it and apparently absolutely nothing to gain from it. Almost no one is mentioning barrel bombs."