What was he supposed to do?? He was supposed to Act like a man! Can you imagine Moe Greene slapping Michael around? I can't. And why not? Was he bigger or tougher than Fredo? No. And yet I would imagine that Moe would be afraid to touch Michael. Of course, I could also never imagine Michael distracting the help in that manner. Which just goes to show that Fredo should have been taking care of business, instead of taking care of business if you know what I mean, and that's why he was a big ol' boat anchor around Michael's neck and Michael was right to kill him.