Dude, we did fuck it up. Big time. A century ago I could have agreed with you, but we spent the last 100 years or so messing the place up in ways that even their religious bullshit couldn't. British mandate in Palestine rings a bell?
We started by arbitrarily drawing lines on a map without considering who is living there. We basically divided the Kurds up (who were, by the way, our allies in that war and we promised them if they bash the Turks we'd hand them their own country) between three successor states and didn't give a shit about where which tribes wanted to live together or couldn't stand each other. Then we fucked them over again with Israel. It's easy to hand over land that ain't yours, granted, but it's still bullshit. And when oil became interesting we pumped the juice out of their soil without even really asking whether that's ok.
Iran (back then Persia) until 1979, then the Iran-Iraq war 80-88, then the whole bullshit with Afghanistan 'til the 90s, then turning our back on them when we made peace with the Russians... Let's face it, folks, we have been bullshitting them for about a century now, I can understand that they're kinda pissed.