Using Steve Hutchinson as an example of "douche" like play, you could make a case. On similar grounds, any good offensive lineman can be clarified as a douche if they play with his level of intensity and violence between the whistles. He is one of the best (if not the best) run blocking guards in the league and finishes each of his blocks with some nastiness (so to speak). That's what makes him great. The difference between him and a guy like James Harrison is that Hutchinson does his job within the bounds of the rules. Harrison knows what the rules are, knows that people are looking for him to break them, and breaks them anyway. Then calling the commissioner a "faggot" in an interview is a bad technique. Not as bad of a technique as repeatedly calling out Rainman while being a teenage girl commenting on the NFL, but close.
I don't think that anyone should comment on how to play a game if they have never played it before. Commenting on professionalism is one thing, but talking about how to play the game is asinine. This is why I think that the drive to get more women into a football broadcasting booth is stupid as hell. There is SO MUCH more to football than most fans know, and learning that is done by spending hours and hours on a practice field and in meeting rooms and in film study. Not watching a football game or two a week. In college, I spent almost 40 hours a week just on football stuff. That is why former players make the best broadcasters and can give actual good insight to the game instead of "nice run!"
I played Division 1 football, and they teach you to tackle the exact same way the teach you to tackle when you're 6 years old. Good base, eyes on his belt buckle, drive THROUGH the ball carrier (most often screwed up), fire your hands up and THROUGH the guy, and grab onto anything you can get a hold of (including stupid ######ing dreadlocks), and swarm to the ball carrier so that 10 other teammates drive him into the ground. Here's a perfect example of a big hit coupled with good form tackling by the best (IMHO) Middle Linebacker in the league, Patrick Willis.
https://www.youtube.com/watch?v=1VHCdAGccOg