I actually think we are learning from our mistakes (Iraq).
I don't see the general public supporting engagement. True, Kerry gets top headlines in the papers, but there is usually a very critical article right below (case on point, the WSJ this week talking about the rebels in very negative light with links to Al Qaeda).
EDIT: And every time Kerry talks, he has to preface his statements with "this isn't going to be like Iraq". We're all thinking otherwise.
US always learns from its mistakes and comes up with a new way of bringing peace! </sarcasm>