I'm not saying all capitalists, I'm saying it is in the interests of certain capitalists. I'm sure McDonald's would love to have a stable region to begin building franchises in. On the other hand, a military contractor's profit is in part tied to conflict ridden regions.
I don't really see what your example of Saudi Arabia proves. We sell them arms and purchase much of their oil, it's in a lot of people interests to keep them stable. I'm saying in some cases it is in business interests to keep a region in conflict, and sometimes imperialism leads to instability or a lack of material wealth, promoting extremist thought.