Oh...boy...okay, I agree, I hate when people 'whip' a horse, but sometimes a horse needs a good pop. Horses in a herd don't baby each other, and have no problem throwing a whallop of a kick until the other horse DOES back away. You aren't going to get her respect unless you tell her who is boss...that doesn't mean whipping her senseless, that means popping her once or twice when she needs it.
Horses really don't hold a grudge if you're a fair leader and popping them once or twice, ESPECIALLY when they kick at you isn't bad. My horse tried once and I put the fear of god into her, she thought she was going to die for about fifteen seconds. Now I didn't hurt her, but I smacked her really good once and made her back around the arena and do some spins like her feet were on fire, she's never tried it again and I don't think she will, it hasn't damaged our relationship, and I didn't beat her, but I told her that kicking at me was not acceptable, and she got the hint.
You're horse isn't 'sensitive', she's just spoiled, I don't want to offend you, but you DO need to get the respect of your horse, and sometimes poppin em pretty good once or twice is the answer. Other wise she will get worse, and she will