One does not enter into war simply for the sake of entering into war, and one of the best gauges of whether the warmongering that you're contemplating is justifiable (which it rarely ever is), is whether you have built a solid consensus amongst your allies. Which hasn't happened yet, to the best of my knowledge.
There are times when entering into war is a necessity, where taking a stand despite popular opposition is at once brave and admirable. The last clear-cut case of this was World War II, which is one of the reasons that FDR is one of my personal heroes. That man had courage, and did what he believed was right (and, Japanese internment camps aside, you simply cannot cut down the legacy of a man who saved our country not once but twice).
I don't see that as the case here.
(Notice I didn't not once mention Bush in any way, shape, or form.)