But if you want to discuss this fair and balanced, then where are Western-European powers in the picture, or the UN?
You forgot the former USSR...they are in this neck-deep too.
The UN was basically rendered ineffective in the Middle East (still is, really) because the US, Britain, France, and Russia (and now China, but they are a relative newcomer) all had interest in the oil. The western nations divvied the place up after WWI, they installed and controlled governments, they treated the people like garbage, they discouraged modernization of anything but the oil fields.
The US was and still is the biggest player when it comes to that. They have been the most involved, especially since WWII, and have arguably been the most brutal.
Does Europe deserve to shoulder some of the blame? Most definitely. The lion's share of responsibility really goes to Exxon...the Rockefeller family really...and the US government though. The historical facts all point to that.
There is a similar pattern still playing out in South America. There are the beginnings of it in Africa. It is a different kind of colonialism, but it is still colonialism and the brutal results are still the same, and just as predictable.