Crabtree just lost an opportunity to go to the Super Bowl, what other reaction would you expect from him? Sherman was trying to get a rise out of him, without a doubt. I didn't think any less of him after his comments/outburst, and this does not make me think more highly of him after this.
I understand the whole "new school" idea with these younger players, and I can honestly give Sherm a pass given the energy level having just made that play. However, in general I think he's just a TINY bit conceded and will one day in his career look back and say to himself, "Yea, that was a little much".
As an aside, Manning is a pretty smart guy and I don't think he'll target anyone Sherman is covering unless the coverage is blown and the opportunity is there. He wants that ring in ways Sherman can't even comprehend yet.
GO BRONCOS!