Come now, Europe this, West that...
The wars that European states has waged against themselves certainly dwarf most things in pure scale. But "cruel and bloodthirsty"?
You want to make the West responsible for Nazism, Lenin-Stalinism? I beg your pardon, but I see it much differently, the West defeated these ideologies. Volunteered and shouldered the burden to do so.
You're missing the point - the West's grudge match over ideologies boiled over to the rest of the world, creating mass death, war, poverty and instability. I don't see how you can see them washing their hands of that by taking out dictators in their backyard that started the conflicts in the first place.
As for British imperial ambitions, I reject to make "West" responsible for that, just as much as I reject Soviet/Russian, French, German and Swedish trade with Saddam (pre-Kuwait) (Soviet/Russia, France sold the weapons, Germany built the bunkers and structures, Sweden sold the trucks) being called "Western support for Saddam", as certain left-wing journalists always do, in their hope that people will interpret/read it as "US support", which remarkably many of them do. Besides that, I don't think that the British empire distinguished itself as particularly "cruel and bloodthirsty". Not in the picture of things.
...I'm sorry? Is Britain not part of Europe? Is Germany not part of the West? Is France now suddenly part of Africa, Asia or the Middle East? Western civilization's brash rush to war for the better part of a century is what has led to the rest of the world being war torn and in conflict. The League of Nations and, after that, United Nations bred the conflict-driven world stage we see today by carving up the world based on resources and trade agreements instead of cultural and historical identities.
The Ottoman Empire, finally, had been corrupt and mismanaged for centuries before it was dismantled. And I still don't see the dismantling, of this extremely un-democratic, privilegecracy, as "cruel and bloodthirsty". And what if it hadn't been dismantled?
If it hadn't been dismantled, I suspect the Middle East would be an industrialized, wealthy and moderate region of the world.
Let's not forget - the entire reason the Ottoman Empire entered in with Germany during World War 1. They realized that while their empire was stable and prosperous, they had been greatly outpaced by their European counterparts. In the late 1800's, they spent huge amounts of money to try and modernize their military and infrastructure to better consolidate their empire and prevent the corruption that was dominating its history. Yet no European country would help, viewing the Middle East as backwards... no one, that is, except Germany.
After a few decades of Germany's help, they had begun to modernize their empire, bringing new weapons, tactics and roads to improve structure and communication. So, when the Great War broke out, naturally they wanted to support their long-standing ally. They backed the wrong horse, of course, and then the League of Nations took one of the world's longest lasting, ethnically/religiously and racially diverse empires in history and smashed it up, giving no heed to who they lumped together or put in charge.
And, just like Germany, they slapped terrible reparation payments on them that crippled their economy and sent them back a hundred years in development. Just like Germany, they turned to dictators and fundamentalists to give them stability and hope in a time of crushing poverty. So when Germany, again, rose up, they struck back at the rest of the West who had undid hundreds of years of peace and prosperity in the region. And, again, they backed the wrong horse and were further fractured and pushed to even more desperate financial straits.
The Middle East WANTED to become like the West. They WANTED to become advanced and sophisticated and prosperous. And European racism blocked them and then European war devastated them. If the West had just been greedy and taken the money for technology, the Otomon Empire might have survived and progressed the way the Japanese empire did to a normal, urbanized society. Instead, they were crushed and abused, time and again, by Westerners who just see an expendable people who happen to sit on fields of valuable resources.