Why is everyone so scared of the Patriots?

My only concern i had about the Patriots was that i didn't think the saints would beat them if they had 3 or 4 turnover in the game. Now it seems the Saints have finally shown they can get back to protecting the ball as they did in the first 4 games, my confidence that they can win the game has increased.
With all due respect we played the Bucs. Tampa is not a good team and their defense is suspect. The Pats dominanted both the Colts and Jets of lately and Wes Welker is a top 5 WR in the NFL. There are few teams that pressure defenses to defend the whold field. The Pats (and Saints) are among them. This will be very, very tough. I think both the Colts and Saints could be "upset" this weekend