I would be too. We all knew Giants fans would be cheering about it, but that doesn't make the actual play on the field dirty.
It's only been two preseason games, so perhaps it's forthcoming, but this team (specifically the defense) needs an identity. For the past 10-11 years, when you play the Ravens you know what you're going to get: hard-hitting defense that pushes the edge. Same deal with the Steelers. When you play the Patriots, you're typically going to get a very efficient, well ran offense and opportunistic defense.