What're you kidding me??
Everybody above the age of 5 knows that the Betrayal that fueled this "Rivalry" was that Scumbag Parcels's.
His Betrayal.
His...and his, alone.
Mad Bill was simply rejecting the altered Terms of Employment.
There was no betrayal on his part, thank you very much.
It's become crystal clear, in Retrospect, that the Championships that Bill I & Bill II won with the Giants back in the day owed far more to the Talents of Coach Belichick than to those of Coach Parcels.
Parcels ought to get down in'is knees every day and thank God & Mad Bill for those 2 Championships.
And then he ought to shut his bleeding Pie Hole.