We provided equipment to the Iraqi military, thinking they would use that equipment to fight the likes of ISIS. There would have been somebody like ISIS even if ISIS hadn't sleazed its way out of Syria. We gave the equipment to the Iraqi government in good faith.<quoted text>
"When you have individuals as diverse as Iranian Grand Ayatollah Ali Khamenei and Israeli Prime Minister Benjamin Netanyahu counseling caution to any U.S. intervention, it's time to think seriously about such an idea.
"When your enemies are fighting each other, don't strengthen either one of them," was how Netanyahu put it."
Why did the US leave behind so many tanks, weapons, etc for these people to get their hands on?
We didn't " leave behind so many tanks, weapons, etc" for ISIS to get their hands on. The Iraqis did that all by themselves.
We kinda thought maybe they'd, well, you know, fight.
I don't see a viable option for US intervention in Iraq right now.