What if instead of simply being attack across the city of Paris, ISIS elements attack the Disney theme park resort in France instead with a mass shooting, bombing, and more? How is this reaction different?
Not a damn difference. The aim of the attacks was simply to sow terror and cow the Western world into shunning Muslims (and hence promoting Daesh as their 'saviour'). The only difference is Disneyland Paris is some way away from the city center, and might not yield as heavy a body count. But it'll be no less frightening than OTL.
Also, shouldn't this be in Chat? I mean, it's only two months ago.
This! Killing children rather than adults it certainly going to result in a stronger sense of trauma, outrage, etc.
Unfortunately I think this thread we'll have to necromance in about 25 years or so, before we can calmly discuss it.