Didn't the current conflict have a lot of it's roots in the Arab spring which Obama had happen on his watch - still, Trump is bad, Obama was good.
The Western democracies role in all this remains questionable in so far as we seemed content to overlook the non democratic regimes in these countries for many years despite them often manifesting as the majority of the population being controlled by a powerfull minority based on tribal/religeous/ military elites --- stability by oppression was OK provided it was in our economic interest especially with respect to oil or trade.
The conflict in Syria has its roots in the 2003 invasion of Iraq. It de-stabilised the entire region and created the conditions that enabled ISIS (Islamic State of Iraq and Syria) to flourish.
Bush and Blair are bad....
Blair pointed-out in his defence (on several occasions) that Arab dictatorial regimes have imploded all around the ME on their own accord and without any Western invasion.... Tunisia, Libya, Egypt, etc - and on balance this is what would have likely happened in Iraq if Saddam was still in power when the so-called Arab Spring broke out. And he does have a point.
Blair has many opponents, and him and Bush are regularity made scapegoats for the mess in the ME - but to the impartial observer it is not at all obvious that this is indeed the case.
This is not to say that the invasion of Afghanistan and Iraq was justified or good.... just that it can't really be blamed for all of the ME's current maladies. Most of these would have happened anyway - the ME has always been a troubled region.
Personally I think that the role that the invasion of Afghanistan and Iraq played in brining about the current instability is often exaggerated. The previous 'stability' was very fragile and countries were only held together by oppression.