A failure to understand something does not mean it is irrational. It may simply mean that it lies on the far side of our limited abilities to take things in and make complete sense of them.
Organisms are starting to move in response to climate change all over the place. Bees are disappearing and we don't have many of the native pollinators left to replace them. We're in deep trouble; there's no question about it. But ecologists tend to think of something that's going to be bad in ten years as very fast, and of course, politicians only think of things in a two-, four-, six-year cycle.