You can't deny the West has contributed in major ways to modern destabilization in the region. The Sykes-Picot Agreement after WWI led to what set all the modern borders of the middle east which were drawn for Western benefit not any sort of logical reason or local determination. Its why you have a 100 years of problems like the Kurds spread across several different artificially created nation states and making up an oppressed minority in all of them.
"The
Sykes-Picot Agreement created the modern Middle East. It represents one of the first instalments in a long line of modern European – and subsequent American – meddling in the region. And, in providing a set of unrealistic and impossible promises to the Arabs, it led directly to the Israeli-Palestinian conflict.
The
line across a map of the Middle East it drew created colonial spheres of influence that cut directly and artificially across a region that had previously been divided along ethnic, linguistic and religious lines.
Area “A” was to be under French influence and control, while “B” was to be under British influence and control. The Sykes-Picot Agreement also proposed an “international administration” for Palestine.
In 1920, the latter region was transferred to British control as “Mandatory Palestine”. It was governed under British civil administration until 1948, during which the competing Arab and Zionist nationalist movements clashed with one another.
The cause of many of these clashes were unrealistic promises made to each side by the British; promises directly related to the artificial arrangement of the modern Middle East initiated by the Sykes-Picot Agreement."
https://theconversation.com/the-sykes-picot-agreement-and-the-making-of-the-modern-middle-east-58780
And that's just the start. While you can certainly blame the rise of radical Wahhabism for some instability you can't ignore the responsible the West has for instability as well.
Oh and their wealth results from simply sitting on the largest reserves of fossil fuel energy. That wealth is independent of anything anyone could/would have done.