ISIS is a creation of the US government. Obama has plans for it.
Netanyahu is going to Putin to make sure that Israel’s interests (Hezbollah and Iran) do not conflict with Russia’s ISIS. Israel wants to be able to hit targets in Syria without having to deal with Russia’s mil who are already heavily engaged in the fighting. The bullets have been flying for a while now. And ISIS is hurting as it looses US heavy weapons and M1A1s taken from Iraq.
Russia, China, Iran, Syria, Iraq, and Hezbollah are all on the same side.