It was what many people in his own time hadn't been able to figure out either, so Bakura didn't hold it against the necromancer. Bakura had learned it on his own through (as most things) trial and error, and "met" Diabound the first few times without even realizing what the creature was. Only by recognizing what affected one affected the other had he been able to put things together. As time went on and more people discovered these strange manifestations, he was able to get more information through watching.

Ironically it had been the Priests themselves, who bore the Items and tried to help Egypt's people come to terms with these monsters, who got it wrong. As Bakura only now knew, were side effects of Zorc's awareness being unlocked and thrust back into the living world. Before that... well, it was entirely possible that the last time such creatures had been free was in Atlantis' time. (Bakura had a number of theories on that as well, but that was for another time.)

But the priests had tried to instill the idea that good people had good heka, and therefore they weren't to be feared because the strongest of them, like the Pharaoh, had more powerful kaa than anyone who might stand against them. And yet Bakura saw that there were a disproportionately large number of criminals with ka, not ordinary citizens. From that he had reasoned that most people had approximately the same amount of heka inside of them, and that the kaa were shaped by something else. Many criminals showed little or no regret for their actions, and Bakura further surmised that had a great deal to do with it.

His understanding of the whole thing had improved significantly with the Ring (with Zorc) but Bakura had always been satisfied with how much he'd put together on his own.

Look, Emily-Helen said, surprised and cautious at the appearance of the glowing mist. Oh, it's pretty!