Don't forget who installed and/or abetted so many of those dictators. The West carved up the ME into synthetic countries that often didn't make sense from a historical/cultural standpoint, and generally supported whoever it thought would keep a lid on the pot and maintain the flow of oil. I think that we are hardly in a position to cast stones.
Unfortunately, we live in a world where a Bible Scripture won't do. After all, we conducted our own Civil War, so who were we to interfere with Europe during both World Wars? And plenty of jurors condemn thieves even though they may have stolen something as a kid. "Not Casting the First Stone" merely allows the garbage to mount up.
To be more honest, it was Europeans that carved out the Middle East and rewarded those who maintained business. Americans came along after World War II, after these populations rebelled during the Age of Independence, after they backed military coups against former European appointed leaders. We dealt with what was there and assisted in a few ourselves (true) in a quest to kick the Soviets out of the region. But the Cold War is long over isn't it? Why then do we still insist on those rules of organization even as we criticize what we did to uphold them?
But in the end, most of the Middle East is a mess because of Muslims. People seem to forget this when they seek to blame the "foriegn devil" for all problems. Muslims rebelled against Muslim leaders right after World War I and settled for their new leaders, which were oppressive. If Turkey's military could coup against religious oppression and start a democracy, why couldn't the Arab Middle East? After World War II, military leaders like Nasser couped with the backing of his people and only looked to the West for support after the Suez War when the Soviets proved to be incapable of being an ally. Considering that we bombed Gaddafi in Libya during the 80s, how much of a supporter were we? Saddam Hussein was of use really only when Iran proved to be a belligerent, but he screwed that up when he crossed into Kuwait and threatened the perverse international order. Iran has the only real grievance, but considering that they took out the Shah in 1979, three decades later they don't get to complain about where they have taken their society and blame the outside.
The self-flaggelation that Americans do in regards to the Middle East has always been exaggerated. Muslims have tried every sort of governance since the Caliphate except for Democracy. Often enough they have chosen to support whoever was against Western Europe (there colonizers), which placed Arabs squarely in the Ottoman, Nazi, and Soviet camp. This meant that most of the Muslim leadership chose to be as anti-Western as possible. This also means that America, as the leader of the free world, was by association an enemy of God. They have failed every single time with their decisions, because it not only placed them constantly on the wrong side of history, but the one system of democracy that works is only being tried now. They have always considered it, but utlimately, the Muslim powers have chosen other routes. Much of this is because Islam is governance. This means that Western democracy, with its absence of God, was never an option. Imagine a Europe or an America where religion is government and there is no separation between church and state (a root prescription in Christianity).
But even if we want to exaggerate our roles in creating the Middle East, does this explain why the extreme slaughter throughout the region has always been Muslim on Muslim...and not from an external source? They behave in accordance to the demands of their own self delluded prides and egos. We can even fine tune this down to the Sunni Tribe. It's the Sunni that look down upon all other non-Arab players within Islam. It's the Sunni that prides itself on Muhammad's lineage and cast superior judgements on all others. It's the Sunni that created Islam. It's the Sunni that rebelled against the Ottoman Empire when they assumed stewardship of the religion and stagnated the civilization against Ottoman attempts to reform along side Christian Europe. And it is the Sunni today that make up almost the entirety of Muslim on Muslim violence throughout the region. This is why this Arab Spring (largely of Sunni base) is important to their historical development.
Culture is fate.