I think he sings meaningless lyrics in a needlessly bombastic way to try and make them sound like they mean something. There is just nothing there. It doesn't matter how much fake passion you inject into your singing if the words don't mean anything. Singing in an impassioned way when what you are singing is basically any old rhyming words (and sloganeering) is hollow, empty and artistically bankrupt. It means fuck all and it sounds soulless, fake and just plain awful. They put more effort into their haircuts that the content of their songs.
Still, it took me a while to figure this out, I used to like this kind of stuff when I was younger too (without wishing to sound like i'm being condascending, I'm really not) so... err. Enjoy your Killers. But I will continue to think they are the most inconsequential band on the planet.

You fucking what? Have you even seen them live? They were shit.

Tom Waits has the voice of a drunken angel nervously ushering in the apocalypse

whereas fred durst is minnie mouse on lambrini, and dom masters is ........................a cunt

mike pattons voice actaully is an instrument on that bjork album ...isnt it ?

worst - anyone in a rock/rap combo, ur man from embrace, dude from the others

best - johnny cash, the fella from turin brakes (seriously), dude from I am Kloot (for the regional flavour), tom waits, elliott smith (although this may be down to the way his voice is produced on record, i.e. very doubletracked)

loads more but ive realised i cant be arsed to type......