Your point is one that must be considered seriously. A rational person must view his or her actions with the constant knowledge of the fact that we indeed are at war.
As a former supporter of Senator McCain (I am shamed that I helped elect him to the Senate) I wish to offer my thinking on this subject.
Senator McCain is irrationally angry. He doesn't just have a temper problem, he lives as a temper tantrum. His abuse of people who have only slightly irritated him is a matter of the public record, is consistent, and has always been repugnantly extreme.
Angry people, especially ones with as chronic a temper as Senator McCain, are simply irrational in the fit of their anger. Their judgment is absent. It is one reason we have recognized the irrational aspect of behaviour committed in anger in our own laws - see "fighting words" and the concept of "crimes of passion".
The fact that angry people are by nature non compos mentis is beyond dispute. Those therefore with a consistent and persistent temper problem are subject to simply being insane/irrational a great portion of their waking hours.
Senator McCain is a greater danger to our safety and security, strangely, than either of the Dems. I am convinced that he is incapable of "putting a sock in it" and is enormously likely to cost us a hideous butcher's bill due to his irrational temper tantrums.
Therefore I'm sorry, I do not find your defense to be as persuasive as you may have expected.
You may take Hillary or Obama as Commander in Chief over McCain during wartime, but not me.
There isnt much I can agree with McCain with, but there are a precious few issues I can. Pro-life is one of them. I strongly disagree with you saying McCain is more dangerous than Obama and Hillary (not to mention the cabinet and judges that they choose) than McCain.
Islamic terrorism will come to our Country again. If nothing else, I will be voting in a way to keep Obama or Hillary out of office so they would not be the ones to respond to any possible attacks. Our soldiers that fight in a war deserve more than Hillary or Obama, and my personal dislike of McCain is NOTHING, when compared to what their needs are.