The thing is who decides who gets killed and who not. You could argue that Bush caused the massacre of thousands of Iraqis, or something similar for past Israeli leaders. Does that mean that we can assassinate them? W/out even a fair trial? Once you go through that path, things get scaringly fuzzy.
It reminds me of the idea -popular in Latin America- that there are bad dictators and good dictators (pro markets, etc.). I've seen people that supposedly like freedom and democracy take a very pragmatic approach, being happy under the rule of Pinochet/Fujimori/etc.
Good/bad dictators is a well known debate. "King" is an old term for "[military] dictator".
One bad problem is that most every king/dictator made certain to put his own relatives in positions of power. That means that the leadership competence in future generations will be very varied.
From history studies, somewhere between 25%-75% of my country's royalty were total asshats. When you have a fixed incompetent leadership that is very hard to change, then employees/citizens/etc will suffer.
There are more problems, like that you just can't tell an absolute ruler, which has been brought up for the job, all the things he needs to hear. [Edit: A dictator can be said to have an alternative version of "Kill your darlings", when someone complains about his worst ideas...]
Edit: To sum, I'm with Churchill on this: "... democracy is the worst form of government except all those other forms that have been tried from time to time."
I've read about that discussion but lacked the energy. :-)
(Anyway, your link might have a point in that the inherited dictators might on average be less actively evil than those that crawl to the top of the heap. That seems like arguing that some cancer form has a little bit less mortality than lung cancer. It might be true, but the practical/emotional impact is low.)
It reminds me of the idea -popular in Latin America- that there are bad dictators and good dictators (pro markets, etc.). I've seen people that supposedly like freedom and democracy take a very pragmatic approach, being happy under the rule of Pinochet/Fujimori/etc.