ISIS has hit the French capital and killed over a hundred citizens with double that number injured. I know the West does the same and, in fact, kills tens of thousands, but this clash of fundamentalisms leads nowhere. The West is NOT morally superior to the jihadis. Why is a public execution with a sword worse than an indiscriminate drone attack? Neither can nor should be supported.
There are three important pre-requisites to re-stabilising the region:
end of Western support to the extended Saudi royal family; end of all Western intervention in the region; a single Israeli/Palestinian state with equal rights for all its citizens. As long as this doesn't happen, political freaks and monsters will continue to proliferate.
Nothing justifies the killing of innocents in Paris or in any city of the Arab East.