The way I see it the British and French did not exactly help the situation at all by cutting up the Middle East along mostly artificial lines.
However the problems were there regardless and would have exploded had there not been a French or British presence. All anyone need do is look up the multiple Druze revolts in Syria and the Lebanon, or the Armenian conflicts, or the revolts in Arabia or the Kurdish uprisings many years prior to the First World War.
Anyone who thinks that we wouldn't have gotten the same situation as today is dreaming. The difference is that it would have been self contained and probably would not have had as many suicide bombings. Just that it would have occurred in the 1920's all the way to the 1950's perhaps. All we did was keep a lid on it.
I have no White man's guilt. I am from South America so no one in my family had anything to do with it.