Charles H. Spurgeon on Psalms 109:8

Let his days be few. Who would desire a persecuting tyrant to live long? As well might we wish length of days to a mad dog. If he will do nothing but mischief the shortening of his life will be the lengthening of the world's tranquillity. "Bloody and deceitful men shall not live out half their days", —this is bare justice to them, and great mercy to the poor and needy. And let another take his office. Perhaps a better man may come, at any rate it is time a change were tried. So used were the Jews to look upon these verses as the doom of traitors, of cruel and deceitful mind, that Peter saw at once in the speedy death of Judas a fulfilment of this sentence, and a reason for the appointment of a successor who should take his place of oversight. A bad man does not make an office bad: another may use with benefit that which he perverted to ill uses.