While I know he was trying to be good to Rome when he killed Caesar, he didn't think ahead and realize that not everyone would see his way. He should have known that most of the people liked Caesar and would have been very upset by his death. Including his adoptive son and heir Octavian, who has an army. The resulting war killed thousands. Definitely didn't think very much. Then, to top it all off, Brutus ends up feeling guilty, at least in the play he does. Brutus says: "Caesar, now be still: I kill'd not thee with half so good a will.” Which translated and paraphrased means you have been avenged now Caesar, I wasn't as willing to kill you as I was to kill myself. Thus, however you put it, he didn't even fully approve of what he did in the first place and definitely didn't approve of it
While I know he was trying to be good to Rome when he killed Caesar, he didn't think ahead and realize that not everyone would see his way. He should have known that most of the people liked Caesar and would have been very upset by his death. Including his adoptive son and heir Octavian, who has an army. The resulting war killed thousands. Definitely didn't think very much. Then, to top it all off, Brutus ends up feeling guilty, at least in the play he does. Brutus says: "Caesar, now be still: I kill'd not thee with half so good a will.” Which translated and paraphrased means you have been avenged now Caesar, I wasn't as willing to kill you as I was to kill myself. Thus, however you put it, he didn't even fully approve of what he did in the first place and definitely didn't approve of it