You can break him of the aggression but it will require some time, a tough hide on your part, and likely a pen to confine him in during the breaking process. Tonight I will post a setup I have used with a man-fighting game rooster. Nearly two years later he is good to handle, but I will not...
Slow down a minute and look at what chickcanoe has in bold above. I have had problem described by you and it can be fixed or at least prevented with subsequent roosters.