Pete, remember that Fredo told Michel that the hit was only carried out to scare Michael because he was being tough on negotiations. I can believe that Fredo would fall for that. Regardless, I just can't see Fredo have the physical or mental ability to murder (don't forget surprise) 2 hitmen.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."