tis but a man of straw. With Iraq there was a claim of WMDs. Iraq was in decent shape before we abandoned it. Utilities and businesses were open, it was relatively safe. But in the sense that the regime change was probably a mistake you are correct and I would not defend the action. But still it does not absolve either from some blame. I'm not saying "it's all her fault" but it is partly her fault. If you don't want to blame her that's fine, but I wouldn't expect many to go along with that line of thought.
So your position is we should have left 10K Soldiers there yes? Because at the time, that was the argument. We'll ignore that Bush was the one that negotiated the withdrawal, and we'll ignore that the Iraqi's no longer wanted us there, and refused to give our troops immunity.
Those 10K Soldiers (who would mostly NOT have been combat ground troops) would have:
1. Kept Iraq from electing a Shite, pro-Iran government
2. Convinced that government to give immunity to our Soldiers
3. fought all the battles for Iraq against ISIS which was born out of the same folks that were displaced out of power by us and kept out of power by that same Shite Iraqi government
4. Fixed the rampant corruption in the Iraqi government
5. Kept Syria from falling apart which is the primary reason why ISIS was able to establish a beachhead, their capital is in Syria after all
Do tell. You know what would have stopped ISIS in Iraq? Having Saddam Hussein still in charge. You know what would have stopped ISIS in Syria? Considering it's primarily run (certainly at least initially) by former Baathists, having Saddam Hussein still in charge.
You know what 10K troops wouldn't have done, 1-5. 20K troops wouldn't have done it.
If folks want to put real finger on the cause of the strife in the ME today, the fault actually lies not with Obama, or Clinton, or even really Bush, it lies with imperial European powers carving up the ME without zero regard to religion, ethnicity, tribes, or anything other than lines on a map. A ME left to evolve under it's own influences would have developed, for the most part, states that fell into those lines. And the conflicts would be more nation state to nation state vice what we have now.