Board Thread:Warhammer 40k General Discussion/@comment-5846164-20130516215639/@comment-7232811-20130517202330

Ah but it is believed that that WAS to do with gene-seed as well. Read their section on gene-seed. Apparently, it says that the Word Bearers had a subtle flaw that made them dogmatic & stubborn to the point of insanity. But you are right of course when you say that a good deal of the problem was due to how they were also indoctrinated to believe in the Emperor as a god, or as the case was later, to believe in Chaos Undivided. Indoctrination will affect anyone on any subject, now matter how superhuman they might be.