If an event has the potential to be that, it's the near-peer land war in Europe.
The current Israel/Gaza conflict is a blip that is mildly different in degree than the same thing that has happened every decade or so since Israel was created.
The October 7th attacks were way worse than Hamas attacks that came before in recent history. The response was way worse than what has happened before in recent history.
And so both sides feel fully justified with their courses of action, because of what the other side did to them. That is the part that is so much not unique.
The Gaza war will be a footnote to the actual war happening in Europe. When the terrorist attack of October 7 happened, my first sentiment was that Putin will be ecstatic that half of the world's attention will be shifted away from his crimes. A conspiracy minded person might think this was not an accident.