The kid never should have been in the conversation to start a game this year, outside of catastrophic injury.
Taylor's abysmal performance and inability to score more than a single FG in multiple games this year pushed NP (who had only been in the league for 8 months, not 8 years) into a desperation option as a starter. Something had to be done.
Also, look at it this way: Peterman threw 5 INTs. Gave the ball to the Chargers on 5 different drives, right? Unacceptable and historically bad, without a doubt.
Well, how is that really all that different than 5 Tyrod drives ending in a punt?
Rivers and Allen were unstoppable that day. They would have just gone on 70 or 80 yard scoring drives instead of 20 or 30. The Chargers defense was lights out -- Taylor gave up a fumble that was run back for a TD, so they got to him too.
McDermott had to do something. But, the Bills were not winning that game, no matter who was starting.