That's not how you set a screen at all. You're supposed to be a wall. Fisher is strong but not as strong as Lebron. Lebron could have cleaned him up and no way he would have gotten a foul.
You must have never played the game and your love of Lebron is blurring your eyes.
So if LeBron had of anchored himself, stepped back and leaned forward to brace himself for impact, it would of be a foul on him right? I'm not sure how anyone can stand upright with two feet next to each other, take a hit like that and not fall over backwards.