Do you have a link or something about other instances of rapid evolution after mass extinction? I can't find any good sources. But the Cambrian Explosion, and resulting rapid evolutions do make perfect sense if you consider that it was caused by the flooding of the Earth chronicled in Genesis. In such a rapidly changing global environment, rapid adaptations would be necessary for survival.
But this argument can be settled instantly if someone here provides a single observed example of one species evolving into another. Without that piece of evidence, evolution should not be accepted as fact, nor should it be considered to be founded on science. The fact is, evolution has never been anything more than a theory, one that has not been sufficiently proven in the last 150 years. People claiming that evolution is fact do so purely out of faith, not science.
EDIT: Let me be clear. I absolutely subscribe to evolution in the sense that species adapt over time to survive in changing environments. But I cannot subscribe to the kind of evolution discussed in this thread, that humans (and all other animals) evolved from single-celled organisms. Nobody in this thread has provided sufficient evidence to that end, and scientific study has yet to provide this evidence in the last 150 years. So if you believe that life as we know it evolved from single-celled organisms, you do so out of faith that one day we'll discover that evidence. You do not do so in the name of facts and science.