I would wonder what a public opinion poll on 12/6/41 would have shown about our involvement in WWII. I would imagine it was probably 80/20 against. Doesn't make intervention right or wrong but public opinion isn't always the be-all/end-all of what we should do as a nation. A lot of people don't like tanks; should they be able to allocate their tax money to only non-military activities of the government? I don't think so.
What bothers me is that the US is perpetually uncomfortable with calling our actions what they were. Afghanistan was about attacking the Al-Queda and their support. Iraq was about oil. What is this about? Revenge? Getting rid of an apparent murderous dictator? I'd rather fight over oil than that...one is in our national interest and one is not. Call it what it is.
There's a big difference between WWII and now. Then, we were actually attacked by a significant military force. Germany was starting wars of aggression all over Europe. We had no choice back then, but to go to war.
That's not the way it is now. Now, we're the ones playing the role of the Germans. Making up these bullshit reasons to attack sovereign nations.
Why? The real reason behind all of this (Afghanistan, Iraq, Libia, Syria, Iran, etc), is to open these country's up to the derrivitive market of the WTO, in order for the big banks to maintain their profit margin.