the stake trhough the heart I forgot that part I thought anna shot him?

Ben is being humanized by the LOST series and eventually it will become more clear
as to the reasons why.

I have said before Ben will emerge as a Hero

For sure Ben has HUGE info thta keeps him in control and the other folks need some of this info to survive..especially Locke for now

One of the other forums had a thread about how many Others vs LOSTies were killed by one another..
Also Ben had many opportunities to kill Jack Kate Sawyer ect..but chose instead to cut deals