Perhaps we know, but the reasons will be unpopular.
China in Tibet, China's treatment of the Uyghurs, Russia's war against Ukraine, Kony 2012 etc, there are lots of causes where the local government in whichever country you look at isn't actively involved, yet there was a lot more public noise and campaigns.
I don't know what the answer is, but "my government doesn't deliver weapons to them" hasn't been a reason before, so I don't see why it would be now.