I read the nutjob's list of demands.
It seems he didn't like humans very much and he really didn't like babies.
Please don't call him an enviromentalist, that's not what he was. A true enviromentalist is concerned about the long term welfare of the human race and the condition of the planet that we leave to our children. After all, the planet doesn't need us (about the only thing he had right!) but we need this planet and the natural systems that sustain life on it for our own continued survival.

This was just a confused and deranged individual with a lot of mis-directed anger.