Extreme opposing forces many a time unite when they are faced with a very strong moderate (centre) coalition.
"#Hizballah" and"#General Aoun" in Lebanon
"#DAAISH" and "the #Syrian Regime" in Syria
#Russia and #Iran and North Korea
IRAN and #AlQaida in #Afghanistan
I can imagine a time when a possible DAAISH / IRAN / RUSSIAN coalition might seem feasible one day in Syria and Iraq.