First of all, he starts out inviting you to examine the word in the original language, but then doesn't bother to finish that thought so you could understand what he then compares it to.
Then, it basically says, the GB isn't dogmatic (although the definition fits them to a T) because it's a group. So, groups can't be dogmatic?
So glad I don't have to try and turn my brain into a pretzel trying to agree with this very convoluted "dogma".