After Harold Camping's last failed attempt at predicting the Rapture he repented for his sinful predictions and gave up the prediction game instead of reworking his predictions once again,
All of the Watchtower leaders that have made asses of themselves over the decades, (as Rutherford put it after the Ancient Worthies didn't show up for him), could have done the same, but they chose not to.. If they had eaten some humble pie and admitted that they weren't Jehovah's Channel and that it was them who were guilty of 'running ahead of Jehovah', (not the any of the rank & file who disagreed with them), then you could blame any followers that still chose to follow them. The leaders all had numerous opportunities to do that but most of them chose to carry on the scam, so don't blame their victims.