I really wouldn't call the article a rambling mess. It's just long, but it contains plenty of interesting information that most people don't know.

The blood/kosher thing is readily explained by this part:

Strangely enough, many of the traditional rituals are explicitly intended to fool or trick God or His angels or sometimes Satan, much like the mortal heroes of some Greek legend might seek to trick Zeus or Aphrodite. For example, certain prayers must be uttered in Aramaic rather than Hebrew on the grounds that holy angels apparently don’t understand the former language, and their confusion allows those verses to slip by unimpeded and take effect without divine interference.

I'd say it's one of the most important bits in the article, it really explains a lot about Jewish mentality. It's the part that made a lot of things just sort of click for me, like a bunch of puzzle pieces fell in place suddenly.