Bastards. Well, I hope that Russians will soon finish off ISIS. That can't come quickly enough. While normally I don't approve of their rougher methods, in this case, I'd say they go right ahead and do their worst. Few people deserve to be worked to death in Siberian gulags, but it would be the most appropriate fate for those terrorists, I believe. If they'd picked that place to annex instead of Ukraine, nobody would've complained.
Also, I think that it's a good time for France (and Germany, and perhaps other EU countries as well) to rethink their refugee policy. I certainly wouldn't like to see an "Islamic State of France and Germany" pop up some time after ISIS is cut down by Syrians and Russians... We all remember Jesus and his story about a good Samaritan. I urge people to also remember Aesop and his story about farmer and the viper. I wouldn't be surprised if that's how those bastards got in.