do you think the caporegimes were afraid of don corleone? He split them into two different boroughs when they were coming up in the life, and even tessio understands its a security issue and that the Don "didn't want his capos to conspire against him."

if one of the capos didn't follow an order of the don, would they be whacked? if they were old friends, and vito asked tessio to whack someone and he didnt, what do you think would happen?

i'm asking becuase i never really saw anyone (inside the family) deny the don, or flat out say they wouldnt do what he asked. would he kill one of them?