Why should this be the breaking point rather than many other things that happened in the past? Like the school bus, or Mastaba market bombing, or whatever. I'm

Why should this be the breaking point rather than many other things that happened in the past? Like the school bus, or Mastaba market bombing, or whatever. I'm not saying it shouldn't. I just don't get why this is so special, or more serious than other stuff Saudis were/are doing.