What? Your "Evidence" Against Belichick is Weak. Besides, Shouldn't Mangini Share Any Blame?
First of all, you say nothing about Manginis problems and breaking of the rules(stealing stuff from the Patriots such a s scouting reports)).
Second of all, you really don't touch upon the fact that Mangini was more than likely in on the "secret" while he was there. Doesn't that put some blame on him? He didn't squeal then, why is he doing it now? Multiple players have left the Patriots who would have had to know about it for them to counter attack against those plays. Do you really think that they wouldn't say anything even if came down to their team and the Patriots in the playoffs(see Adam Vinateri)
Third of all, don't act like the Patriots are the only ones who have done it. Multiple GMs have admitted that teams break rules all the time.
Also, I highly doubt that no one outside of the organization was aware of this, and do you really think that they would allow the Patriots to win 3 Super Bowls without spilling the beans? I highly doubt it.
Again, your list of evidence (w/ the exception of the Detroit game) are all hearsay. No one can prove them.
Did the Steelers ever think that maybe the Patriots were just better than them?