Even if all life on our planet is destroyed, there must be other life somewhere which we know nothing of. It is impossible that ours is the only world; there must be world after world unseen by us, in some region or dimension that we simply do not perceive. Even though I can't prove that, even though it isn't logical - I believe it.
This is how Americans think. You believe that if something terrible happens to someone, they must have deserved it.