You made it appear that you had absolutely no idea what you were talking about. You didn't reveal enough in your writing (not that you had much room to) to show that you even owned an Eldar Codex, much less read it.
Oh don't be silly. So it gave you the impression that I hadn't even read the Eldar codex? Despite the fact that I displayed clear knowledge of:
Striking Scorpions
Exarches and the role of Exarches
Khaine
The weapons used by Striking Scorpions
The Tyranid invasion of Iyanden
The existence of Spirit Stones
Farseers and their psychic abilities
The ultimate fate of the Eldar and their relationship to Slaanesh
Do tell me, where did you and your cousin think that I obtained knowledge of all these concepts? Wikipedia?

Furthermore, if you're seriously expecting me to explain the idea that in a population of millions of free-thinking individuals, there will be an odd few who do not conform to the concensus shared by the vast majority of the rest of the population, then it seems to me that you are suffering from a simple lack of imagination!