GtoRA2,
Don't read to specific a meaning into these things. There are a lot of possible reasons.
For example in my case I don't, and never have, felt a personal threat from terrorism. I have talked to people who were near frantic with worry about a terrorist attack at some essentially nameless location like Novato, CA. I believe that Bush and Kerry would both go after the terrorists as they should, though I think Kerry would have been slightly more effective. Given the relatively even status I held the two candidates in regards to terrorism and my lack of personal fear about it, it was not that high a concern for me.
So you see in my case it wasn't an issue really because I trusted Bush and Kerry to both take care of it. I think Bush will get Osama bin Laden.