Нет, вы ошибаетесь. Вы ситуацию читали: это лагерь мировых болельщиков, типа как Евро-2016. Часть из них спрсонья и спьяну не поняла, что присходит, а потом
The floating people were suddenly illuminated as they passed over a burning tent and Harry recognized one of them: Mr. Roberts, the campsite manager. The other three looked as though they might be his wife and children. One of the marchers below flipped Mrs. Roberts upside down with his wand; her nightdress fell down to reveal voluminous drawers and she struggled to cover herself up as the crowd below her screeched and hooted with glee.
“That’s sick,” Ron muttered, watching the smallest Muggle child, who had begun to spin like a top, sixty feet above the ground, his head flopping limply from side to side. “That is really sick. . . .”
Hermione and Ginny came hurrying toward them, pulling coats over their nightdresses, with Mr. Weasley right behind them. At the same moment, Bill, Charlie, and Percy emerged from the boys’ tent, fully dressed, with their sleeves rolled up and their wands out.
“We’re going to help the Ministry!” Mr. Weasley shouted over all the noise, rolling up his own sleeves. “You lot — get into the woods, and stick together. I’ll come and fetch you when we’ve sorted this out!”
Bill, Charlie, and Percy were already sprinting away toward the oncoming marchers; Mr. Weasley tore after them. Ministry wizards were dashing from every direction toward the source of the trouble. The crowd beneath the Roberts family was coming ever closer.То есть мистер Уизли тупо вызвал подмогу, потому что это явно не обычная драка фанатов. И вызвал так быстро, как только понял, что это.