Why and How ISIS Might Exploit Putin's Nuclear Compellence to Destroy Russia (globalsecurityreview.com)

Russia would be unlikely to consider the possibility that the launch was in fact performed by an uninvolved third party such as ISIS.

End quote.

But if Russia reads Hacker News, they've just been made aware of the possibility.

And BTW, the implication is that Russia would retaliate against NATO, destroying more than Russia, but that wouldn't bother ISIS.