Aside from many factual errors, the main problem with this book is that it feels like it is written by a middle schooler. The average paragraph is about two sentences, and the writing style itself is extremely low-level.
It is also full of dumb arguments (my favorite: Hitler was actually a socialist because he liked art and was a vegetarian). None of the arguments are fleshed out at all because Dave attempted to put in every single right-wing talking point he could get his hands on. He explains everything on the surface without ever going in depth. So if you are just looking for a regurgitation of the right-wing talking points you are probably better off buying some other book,
On the bright side, this book only took a couple of hours to finish.