I don't think the current election is a good barometer for ideology. War is a big deal to some people, and they'll vote for the person who is likely to cause the least amount of death regardless of ideology. Then there's the whole intolerance thing, which maps poorly to ideologies, but strongly to political platforms.

In general, lefties think Obama's less militaristic policy will save lives (because diplomacy will work).

And righties think McCain's more militaristic policy will save lives (because the question is when not if to fight).