His motives for kidnapping the princess were clear - he wanted to use her as a bargaining chip to force a deal with the king of the rival kingdom. Despite not being a ruler himself, the warlock's power and influence are not to be trifled with. He has the potential to cause great damage and destruction if provoked. But, deep inside he is just a lonely man taking revenge on the kingdom for killing his kind, his family and being so cruel towards innocent humans and animals. He's snarky and rude.