I see what you're saying about Sherman, but on the flip side, I think what we saw was pure, unbridled and unfiltered passion of a competitor.
We are so used to a sort of scrubbed and sanitized presentation of pro athletes these days, to the point that they have handlers, marketing agents, and even classes on how to neutrally present themselves, that when we see one fired up it tends to dislodge us. This was not the typical cliché catch phrases that we hear over and over ad nauseum. Instead, this was a fire breathing dragon in full beast mode.
When you listen to all the other pro athletes out there talking about this Sherman thing, almost all of them say that this is normal behavior and attitude in the locker-room and on the field. The NFL doesn't like us to see this much unless it's in a sanitized NFL Films presentation. That's why they have a 20-30 minute cool down period after games before interviews. We just got a glimpse of it when the media rushed in just moments after a huge play.
As far as the sportsmanship, Crabtree should be just as lambasted for pushing Sherman's face away. Sherman was obviously getting a bit antagonistic when he was trying to shake hands and saying 'good game', but Crabtree just fed the beast with his reaction. Sherman's emotions got the best of him in the heat of the moment, but it's not like it was unprovoked. Crabtree is a trash talker, too, and this is just another chapter in their rivalry book.
In the big picture, this is good for the NFL. Sherman is not a criminal, does not have issues off the field, and is actually a positive force in his community and various charities. His story is one that can inspire inner city youths to value education and improve their lives, and that is certainly a good thing in this world.