I've noticed too that chickens who grow up in a quarrelsome and stressful environment like that tend to become more violent themselves as adults, even the hens.I wouldn't say so.
i've seen (haven't encountered it personally apart from once and it was quite delayed, so unsure what happened there) where people have 2 [or 3 or 4 or 5] males, including a very submissive male that is treated poorly by the others. They cull the assertive ones, keep the submissive one, and the power goes to his head and he becomes quite aggressive.
I'm sure it isn't always that way, but I do know it has happened