This is it^^^ you said it in your very first sentence......that's the kicker. If I'm walking through the arena to pick something up and a spoilt Parelli trained two year old comes flying across the arena towards me with his ears pinned and his teeth bared, you can bet your bottom dollar I'm going to lay it on him.....I wouldn't consider that hateful or negative....I would consider it self preservation and demanding respect......
What happens when someone's kid decides to take a short cut through the arena when the owners turn that horse out???
I've seen a gelding bite someone on the shoulder, push her to the ground and try to lay on her like a bull.......she should have layed it on him the first time he bit her.......but oh well that would have been negative and hateful right? Compared to what that horse did to her.....
Was this horse spoiled from babyhood on? Sure, maybe. Did he need some strong training when he was young? Probably! But whipping him as an adult, damaged horse isn't likely to help.
When Buck dealt with the same situation, as I said earlier, he roped the horse's hind leg, then worked the pants off him in the round pen until he was tired. He put a rider on his back and worked the adrenaline and aggression off that horse. That horse looked changed at the end of that session. He eyes were soft, he was tired, and relaxed. Working a horse, and moving their feet gets you into their brain rather than whipping them and leaving whelts on their hide.
And you might think that horses fight and damage each other in the herd to establish dominance, and that is definitely true, but really extreme horses like that can and do fight to the death. Do you want to get into that kind of battle with a horse? I had a mare boarded one time who had to live ALONE because of her extreme aggression toward other horses. She shared a fence line with another mare for months, and they seemed to get along well. We finally decided to put the two mares together because they had formed a bond through the fence. Well, it took several people with whips to drive them apart after they darned near killed each other. They were tearing flesh off each other, and my mare had so many strained muscles in her hindquarters from kicking violently at the other mare, that she was lame and off work for about 6 months. It was horrible. If someone wasn't there to break them up, one of them would have killed the other. It was outright battle to the death aggression.
So if you have a horse that is THAT dangerous and dominant toward humans, I would not go in there with a whip picking a fight. You might get into a battle that you cannot finish. But that is our human nature - just whip and beat our way to the top. We let emotion get the better of us. You are feeling in danger and threatened by the horse so you want to get even. You want to protect yourself. You want to FIGHT BACK and teach that dirty rotten ________ a lesson!
But I would be willing to bet money your problem would only get worse.
The fact that horse is a Parelli trained horse means absolutely NOTHING. The Parelli program does not whatsoever endorse dominant, dangerous, aggressive behavior!! I watced Pat go toe to toe with my own mare and it was not pretty at times. He was NOT allowing her to dominate and run over him. Pat Parelli kicked my mare in the belly wit his boot toe because he was trying to defend himself. She was running him over and he finally said ENOUGH. STAY OUT OF MY SPACE.
That dangerous stallion in the Buck movie never was exposed to Parelli. I trim a mare who is borderline dangerous/aggressive, and she has been traitionally trained. That mare will come at you with TEETH and ears pinned. It's terrible.
Sure any training method can screw a horse up. But it's not the method itself. It's the person doing the applying of the method.