jacobdawson
Russia is supplying military assistance to the government of Syria, while the U.S. (and other NATO countries) are supplying assistance to moderate Syrian rebel groups (but not ISIS). This breaks it down clearly:
http://mobile.nytimes.com/2015/10/01/world/middleeast/the-sy...
This just happened recently:
http://mobile.nytimes.com/2015/11/25/world/europe/turkey-syr...
Russia has repeatedly warned the US to not interfere directly in Syria (you might have seen this):
http://www.nytimes.com/2013/09/12/opinion/putin-plea-for-cau...
This is all interesting considering the Republicans are already talking about increasing the US presence in Syria (for the purposes of defeating ISIS).
http://edition.cnn.com/2015/11/16/politics/republican-isis-2...
Statistics are nice but the model is too simple and doesn't account for the complexities of geopolitics.