Basically a hard line is being created that Russia or other parts of eastern europe can't cross. If someone attacks a nato country it can trigger WWIII
WWIII is inevitable since it's the pattern of history for huge wars to pop off every hundred years or so but it's still unclear which country will be the one to trigger it.
Israel is going to advance further into West Asia if they complete their genocide against the Palestinians and fully occupy that land. The Israelis know that the only way they'll destroy palestinian resistance is through a genocide. This current government knows it and that's why they didn't have security on Oct 7th and ignored all the intelligence briefings. They don't want an Iraq or Afghanistan style situation where an insurgency just bleeds them over years. They have to either agree to a two state solution or do a wounded knee or holocaust style genocide. If that happens, it could trigger a massive economic backlash against the united states and israel.
The last time a country with a massive and sophisticated military was pressed economically due to its actions, things didn't work out so well for the world.
Russia could make the mistake of attacking a nato country and if they refuse to fall back and they double down like they did in Ukraine, that triggers an immediate response from Europe and (depending on who the president is) America.