I think it's ego personally, we have to think we're here for a reason, and want to think we're seeing something important. Even with the disasters, it's important to remember this planet will keep on spinning for milennia to come. No matter what we do, life will continue and we will be a very tiny irrelevant blip. Even if all life ceases to exist - it'll only be temporarily.
And before people jump down my throat, it's just part of the human condition. Look at the Christians, they've been saying it's the end times for hundreds of years now. We want to believe we're lucky enough to be a part of something big, to be there.
I'm not saying we won't go through hard times, we probably will, in fact it's looking probable. But life is going to be fine. The earth will be fine. Humanity will probably (in the scheme of thousands of years) be fine. Even if we aren't life in general will be.
For some reason that gives me comfort too. Even if everything goes wrong, their anger and hate is such a tiny insignificant thing in comparison to actual time. It will all be forgotten. It's all just dust and echoes.