There's really no value in a debate on whether or not McCain is a war-monger, IMO. I don't think it's at all fair to portray him as indifferent to the dangers of war.
Through his statements and actions, he does, though, see the military as an effective means to achieve our interests. At various times he's advocated or threatened military options for Syria, Iran, and North Korea. He called for ground troops in Serbia and called for invading Iraq just a few weeks after 9/11.
There's a pretty good article in The Atlantic that tries to get to the bottom of McCain's foreign policy thoughts.
http://www.theatlantic.com/doc/200810/mccain