The vampire council was in an uproar. The information that Kace had shared about the hero army that was almost on their doorstep was simply unbelievable! For them to have come that far meant that they had to have gotten past every patrol along the way. If Kace had chosen not to side with them well, they would have been caught with their pants down!
Nobody even tried to claim that he was lying. After all, as far as they knew he would not really gain anything unless it was the truth. It was also a big rush he had taken jumping straight into the heart of their power. They felt as though they finally understood why he had been so confident before. If things did not go his way, he could have slipped off and left them to deal with it independently.