The people of GB have already forgiven him or they will soon.
Cub fans were pissed at Bartman for a few days but a large majority of the people of Chicago and/or Cubs fans forgave him a long time ago
Red Sox fans forgave Buckner long before they won the 2004 World Series.
Human beings are forgiving by nature, the press is not. Buckner's big issue was not the people of Boston but the relentless media and their efforts to kick a man when he is down. Bartman lives in fear, not for his life but of the press that continues to track him down and try to interview him.
Bostick is a kid and that three second mistake will be with him the rest of his entire life. If asked two weeks from now how they feel about him, I would wager that the majority of Green Bay fans would support him instead of continue to beat him senseless. The media doesn't give a shit.