How about some specifics. In the comments to that post, Greg G says:
It is quite true that there is a lack of policy specifics that we have "heard from Romney." One specific that we have heard is that he is outraged that Obama has not been more supportive of the current Israeli government which is seeking our support in attacking Iran.
That has been the specific that he has chosen to emphasize the most. He has also criticized Obama for being willing to announce a specific date for leaving Afghanistan.
But... I don't interpret either of those specifics as favoring military action nor do I think he's unambiguously more "warlike" than Obama's policies. Rather, both cases relate to the feeling that Obama is sending the wrong signals to our friends and enemies around the world.
Foreign policy largely seems like a signaling game to me. Sometimes conflicts might be unavoidable, but history shows that lots of conflicts arise from misunderstanding the signals both our friends and enemies send. In that vein, once you've reached the stage of armed conflict, you've already lost.
Put simply, it's wise to tell an enemy you'll hit them back with overwhelming force if they attack. If an enemy questions your will to fight, it's wise to give every appearance that you'll fight and fight forever, even if you don't want to.
With respect to friends, giving them ambiguous signals of support is also dangerous. If your friend starts a fight, do you have his back? Will he start the fight if you say you don't? Will the enemy start a fight with your friend if he thinks you'll jump in? How about if he thinks you'll sit it out and let the friend go it alone?
All of this is pretty common sense stuff from both an every day perspective and a foreign policy perspective. And to my mind, Romney's specific criticisms are pretty valid. We very well might avoid (more) war by signaling our endless resolve to our enemies and communicating our exact intentions to our friends, regardless of what we actually intend.