Why did Paul want God to repay Alexander the metalworker?

In II Timothy 4:14-15, Paul writes: > Alexander the metalworker did me a great deal of harm. The Lord > will repay him for what he has done. You too should be on your > guard against him, because he strongly opposed our message. Paul wants God to repay Alexander the metalworker. In other words Paul wants him to be punished. Why Paul wants a man he hates to suffer? Paul very well knows what a "Christian Love" is, and What Jesus did to those who treated him enemies. Is there any specific reason why he did so?