Bin Laden was just the head of Al Qaeda. You think AQ would have quit if we had quit?
Did they quit after we killed bin Laden? Nope!
This is the same logic the appeasers are now using for Ukraine.
The fact is, the appeasers don't care if Putin takes all of Ukraine, just like they didn't care if Hitler took all of Europe.
"Not our problem!"
If we leave, Putin won't stop with Eastern Ukraine. Hell, he probably won't stop with just Ukraine. Just look at his pattern. He's trying to rebuild the Soviet Union.
Every penny we spend to stop him is a life saved.
As for Iraq, it was just a matter of time before we would have to war again with Hussein.