Sometimes, it really does help to take a breather and go back and read your own posts. I know I have gotten carried away on some posts and I have to take a step back and really look hard at myself and see if I was taking things too personally.
You really are taking things personally. I am truly sorry your child was picked on in the earlier grades. I honestly think that those that pick on others would do so no matter what. If those kids didn't pick on your child for being smart, they would have picked on her for her weight, hair, nose, shoes, etc. Kids can be ruthless and nothing is off limits for some.
If my son ever experienced what you claim your daughter experienced, I would have pulled him from that school faster than you could blink. I would not allow my son to purposely throw tests so people wouldn't pick on him. It wouldn't have been an option and I would have found an environment that was more conducive to his learning. You can only blame the other parents and kids for so long. Eventually, as the parent, you must step up and grab the bull by the horns. It was up to you to find the right environment for her BEFORE it ruined her self esteem. You can not be responsible for the actions of others. There will always be jerks out there.
As for others making fun of gifted students, I just don't see that. Again, I think you are taking things far too personally. Please point out something specific that someone has said and I will gladly defend you. Maybe I missed a post along the way. I do believe we all have different opinions on what constitutes a gifted child but I never read anyone making fun of a smart child. Based on how personally you are taking this post and seeing ridicule where there isn't any, it does draw into question how bullied your child really was. Sometimes parents can ramp up the situation so much that the child begins to perceive things that aren't really there.