Depending on which of these you choose to believe there are up to a million dead since the invasion in 2003.
https://en.wikipedia.org/wiki/Casualties_of_the_Iraq_War?wprov=sfla1
That's a lot of people who have lost a lot of family, and want someone to take revenge on (just in Iraq). I'm assuming a high proportion of those 160 terror attacks you quoted were carried out on Sunni Muslims by Shia Muslums, or vice versa or Hamas on Israel. Israel has been taking out infrastructure in Syria for years in retaliation, keeping it in the dark ages.
I'm not attempting to re-write anything. But do you think these attacks would be going on if we hadn't destabilised the whole region?
That's rhetorical, I mean one of the men who carried out the Paris attacks said this is for Syria...
We had/have no business being in any of these countries, we're in Syria because we want to bring down Assad! Because what? We think that the people there are going to fall in line and accept democracy and live happily ever after? They are neither ready nor willing.
We will reap what we sow. The way I see it, it was our western governments that have caused this, what we're seeing now is the fall out, which pales in insignificance when we look at the death tolls involved in each respective country.
Nobody (well I'm not) is saying Saddam wasn't evil, I'm saying he was a necessary evil.
I'm under no illusion that we didn't help shape what we're seeing today. I wish it would all go away, but it can't.