I would agree IF it was a "scientific basis" but just because these clowns have doctor in their title does not mean they even know what a "scientific" method is.
Their theories cannot be proven, tested using a scientific method. How many pieces of human debris have been released from our prisons because Dr.Ima Nutcase rubbed his distinguished chin and proclaimed "Mr. C.Molester is no threat to society"?
Anything these clowns say have to be prefaced with "IMO" as they cannot prove anything. Its a guess at best.
Their opinions have served to distort truth and reality and certainly have been used as a major component in PC thought.
Why should a "thoughtful" killer be more evil than a "thoughtless" killer. I think the method of killing and the number or killings are more important than how much planning was involved. Also justification should be considered. We go to a great deal of effort to plan an execution, is that evil ? Our military goes to great efforts to plan, train, manufacture weapons, practice effectiveness, is this a trait of evil ?