I do not believe either Bush or Obama were or are "war mongers". Bush did what he felt was right for America. He acted on bad intelligence in Iraq and for that he must be held accountable; however, this does not translate to him being a liar or a war monger as so many leftists like to claim.
As for Obama, he is effecting a continuation of previous policy. Thus far I haven't heard anything which would make me believe that he is either a coward or a war monger. It seems he will take a pragmatic approach towards Iraq and Afghanistan. I think Obama will be successful in terms of foreign policy. He will strengthen our relations with other countries but I don't see him capitulating either. It's just too bad that while he's executing pragmatic policy abroad he'll be gutting our economy from the inside out.