He didn't want to waste his breath with verbal banter, especially since nothing he said would ever diminish the amount of hatred they each felt for the other. Yes, he was a hypocrite; if someone killed Helena as he had killed Aiden's sister, then he would have made sure the one responsible died a very painful death. Revenge wouldn't solve anything, but for a man like him forgiveness and doing nothing were not options. In that sense he understood why Aiden wanted him dead, but that didn't mean he was going to sit back and let it happen.
There had been no guilt then, and there was none now. He didn't think of his victims as having people who cared about them like he cared about Helena, because it was easier that way. Vlad liked the power that came with taking a life, and the taste of still-warm blood that had once fuelled another being was intoxicating in a way it shouldn't have been - and guilt would ruin that. Guilt would mean that he spent the rest of his life as a tormented man, running away from vengeful ghosts rather than eluding punishment.
But none of that mattered now. Whether he felt guilty or not, even if Aiden killed him, it wouldn't make a difference. Vlad knew that, and once he regained the ability to breathe properly he threw every ounce of strength he had forward, intending to pitch Aiden to the ground. His teeth gnashed and snapped shut inches away from skin, while he brought one knee up in an attempt to force him to double over. All he wanted was to kill this man, and his anger and primitive instincts had taken over.