Has anyone noticed any plot holes or things that don,t make sense in movies that are regarded as top quality i have noticed a few.

In Godfather Part 2 when the rizzoto brothers attempt to kill Frank Pentangeli the guy that strangles him say something like 'Michael Corleone says hello'. Why would he say this since Michael didn't sanction the hit? and unless he knew that the policman was going to walk in at that exact moment and wanted him to