It is not cruel. It just ends the life of someone who is whole heartedly believed to have committed an act so evil that they gave up their right to breathe when they committed the act.

Heck, if lethal injection (LI) is cruel, then slide the gurney to the side, pull back the curtain, and sit him in the chair that still exists. It *IS* directly behind the gurney where they put folks to sleep.

Oh, and if LI is so cruel, then how come PETA has not been all over it???