What other choice does a French politician have except to declare 'all out war' against ISIS, after Paris. What actually comes of it is another thing, so far an

What other choice does a French politician have except to declare 'all out war' against ISIS, after Paris. What actually comes of it is another thing, so far any response has been particularly muted. If the overall NATO strategy is that they need ISIS for a bit longer, then France will acquiesce, whether or not Hollande is very upset about it. But of course they will make a spectacle about 'total war', nothing short of that would be acceptable to the public.