Will I kill someone to protect my son{9}??
a great question and the writers are tapping into a vast emotional reserve.

I wonder how many prisons are filled with guys who make impulsive wrong decisions?
decisions based on circumstances??extroardinary events???

I said before Mike did not act premediated but I am thinking now he did..
and he killed Libby to shut her mouth

Benje kills to protect the Island and in a circumstantial way is responsible for many deaths on his mission..MAYBE even Ana L. and Libby

But Mike had choices especially to tell the other LOSTies

BUT Mike is as sick as his secrets and killed rather than share the secret

Mike has proven to be a TRAITOR..he delivered the LOSTies to the evil Ben

Will he do it again???