Week7: You can't Justify Murder

I think Brutus and Casca are trying to justify killing Caesar by saying that they are, "...Caesar's friends, that have abridg'd his time of fearing death."  It seems to me like they are not sure killing Caesar was really what they wanted.  They are very wrong when they think they have done him a favor because to Caesar, "It seems to me most strange that men should fear death..."  Caesar believs that the "...The valiant never taste death but once."