The long term consequences and/or loss of more of his own people, and/or possibility of being fingered by a condemned Rocco or anybody else somewhere down the road was of little if any concern. Roth had to die. Fredo had to die. Was Michael slippin'? Yes, at this point he probably was...but after all that had occurred, why wouldn't he be?
Apple
Your point is very well taken, Apple.
But, taking into account the frustration, anger, need for revenge, etc., that Michael felt (as you outlined), there's also the overarching controller in Michael. What sticks out for me here is that the risk of Rocco being caught, and turning, isn't consistent with Michael's controller instincts.
