I would retaliate with warnings, evacs, carpet bombing, and pushing all Muhammadans inside of Russia's satellite states out, south to their eventual burial spot somewhere in the Middle East, Near East or Persia. I would not kill those that do not pose a threat and let them travel to Muhammadan backward ass mood-god worshipping societies that will have to take them or we take over their nation and move them there. Then, once Muhammadanism is squarely isolated in a non-descript region of the world, I would pitch in to do there what we are doing in Iraq to try and build free societie, as if that's possible inside of Muhammadan nations. If then they continue to allow those among them to behave in a manifestly disgusting way to those not of the Muhammadan curse, I would nuke them like yesterday's pizza and not think twice.
... and I would begin with Israel and the paliMuhammadans.