Mutated?

Alpha Romans main intentions was to totally rule out the idea of their enemies being Demons from their minds, wasn't it quite of suspicious that he was trying so hard to make them not consider the demon speculation? What would he stand to gain if they totally overlooked such a vital piece of information that could help in their investigations? Wasn't he afraid that perhaps their enemies could really turn out to be demon Werewolves? Or perhaps was he purposefully trying to lead them astray? Could it be that he already knew the truth? But if yes, why was he trying to hide it?

"What about the dark aura?" When the mind has believed something it was hard to unbelieve it, even though the Alphas seated didn't fully agree with the demon hypothesis, they still didn't readily go with Alpha Romans persuasion.