Many of the points made on that site are absolutely valid.
It is for example correct that
- commercial dry food has not been around for very long yet. It has only been widely available since after WW2.
- the human food industry (especially convenience foods) also had a big boom after WW2 and companies needed to do something with the masses of byproducts.
- many pet foods include meat from "4D" livestock, and even worse - roadkill, euthanized pets and recycled restaurant waste.
- kibble is sprayed with fat to make it palatable. If that weren't the case, dogs wouldn't find it very attractive at all. Especially poor quality kibble also requires other flavoring agents, such as digests.
- BHA and BHT are banned as food preservatives in Europe.
- it doesn't take rocket science to feed your dog home prepared food, regardless whether you choose to feed raw or cooked.