Roosters, all roosters fight because of sexual jealousy, period. You create an aggressive rooster by scaring, chasing or catching hens in your roosters sight or hearing. After he is confirmed in fighting you, there is usually little that can change his behavior. Even game roosters won't fight you unless you use bad chicken manners in their presence.
In case some of us think that chickens are an intelligent animal, I have over 60 years of experience that says that chickens are not very bright. There was a case in the 1940s where a farmer chopped off Mike the Chicken's head to use his body in a batch of chicken and dumplings. The farmer missed Mike's major arteries and spine, he left SOME of Mike's brain stem but cut his brain clean off. The chicken lived for 18 more months and did or attempted to do all the chicken things Mike did before. Mike enjoyed some success in the entertainment field, appearing in freak shows.
http://en.wikipedia.org/wiki/Mike_the_Headless_Chicken
Chickens have a very short attention span and their world is governed by instinct. If you must pin a rooster spread eagle to the ground and make him think that your going to perform chicken sex on him, my question is, who is training who? In the long run you only make matters worse as your rooster soon begins to view you as a challenger for the favors of his hens.