If U.S. forces intervene in Syria and hit uniformed Russian military forces, the Kremlin is basically warning the United States that it will hit back and that there will be a war.
http://nationalinterest.org/blog/the-buzz/russia-sends-chilling-warning-america-over-syria-24908
https://www.radiosvoboda.org/a/donbass-realii/29102541.html
https://politeka.net/blogs/616488-chto-nuzhno-dlya-mira/
http://www.globalaffairs.ru/redcol/Nazad-k-balansu-19421
https://www.kommersant.ru/doc/3572021
https://inosmi.ru/politic/20180315/241721223.html
Россия жестко предупредила Соединенные Штаты, что не потерпит нападений на своих военнослужащих в Сирии.
Russia and the Kremlin face challenges that threaten the stability of the ruling establishment and could alter the fabric of the country itself. This report examines how the collapse of the Russian governing system could destabilize Russia or lead to the emergence of a new system that radically deviates from existing s
https://store.stratfor.com/collections/country-reports/products/russia-destabilization
http://www.rosbalt.ru/world/2018/03/14/1688616.html