He is absolutely right, there are too many people on the Earth, but that is a situation that will be resolved soon enough. A disaster of Biblical proportions is on it's way and we are not prepared to make the decisions that will help us mitigate it's effects. Let me explain.
For every calorie of food you eat, 10 calories of fossil fuel energy was ussed to grow it, fertilise it, harvest it and transport it to your plate. For around 60 years now, we have been using fossil fuel based fertilisers and pesticides to grow food on land that was previously unfit to grow crops. This allowed a population explosion from a stable 2 billion to the 6.6 billion (and growing) we have today. It is now clear that we will reach the peak of all oil production in the next couple of years.
Without oil this level of population is UNSUSTAINABLE.
We have overshot the natural limits of the Earth to sustain us by around 4 billion people. There will have to be a controlled decrease in the world's population if we are to aviod anarchy, famine and war.
It is extremely irresponsible to continue allowing unlimited population growth, but Governments are only interested in maintaining the current economic model of constant growth, which requires an ever growing population to make it work.
As the model also requires ever increasing supplies of cheap oil, the basis of the model is cracking and we are experiencing the effects of what will be the eventual collapse of the global economy. The coming Depression will be nothing like the one in the 1930's, because at least then there was plentiful resources and room to expand. Not any more, and if populations are not controlled, they destroy the habitats of other species on the planet.
To say that it is blasphemous to reduce populations is to misunderstand the original bible verse, and to ignore another, even more important instruction of God to take care of the Earth.
Geneisis 3 states 'For you are tenants upon the Earth'. We are given clear instructiions to look after the Earth and all creatures on it. We are not following the Lord's instruction if we do not preserve the environment of not only ourselves, but the rich and diverse variety of species in it, both plant and animal, that He created.
Not to do so is the real blasphemy.