I think you are conflating 'has some sort of internal logic' with 'sane'. Of course you can dig around the thing and find some idea that appeals or convince yourself of its structural soundness. But many of the premises are still nuts and the quality and style of writing poor, to put it rather charitably. He starts by pinning the source of world 'craziness' on 'leftists', a broad category that appears to include 'animal activists' and people who find words like 'chick' and 'negro' derogatory and with a helpful forward reference to some 250 odd numbered paragraphs ahead. The whole thing is, again, 35k words. Consider, for comparison, the following famous pieces of political writing:

The Communist Manifesto

Thomas Paine's Common Sense

Jonathan Swift's A Modest Proposal

Each of these is shorter than 35k words. In fact, they're shorter than 35k words taken together.