We are nothing more than a small blip in the Earth's constant evolution. Killing 90% of the people would only stall the inevitable extinction of our race.
I do know several Christian fundamentalists that believe that God will provide everything we want (i.e. God will always make us oil). One even went so far to pray to Jesus for a SUV, I kid you not. What I don't think they realize is that God likes to **** with us and is only giving us the rope in which to hang ourselves quicker.
There are many people, myself included, that feel a general uneasiness about our current state and know that the **** is flying quickly toward the fan. I am sure that those of you in your 20's will definitely see some major crap come down in your lifetime. Live your lives as fully as possible so that you aren't left with regret.