Why not as an international community just guarantee a spot anywhere on the planet effectively for people to move out of Israel and into a country of their choice and give the land back most importantly.
That already happened once, and it is called Israel.
The core issue at the heart of all of this would be the generations of oppression and systemic genocide done to the Jews of Europe and the Middle East that necessitated the establishment of a sovereign Jewish state. And barring any better options, it was decided at that time that the best candidate was the ancestral homeland of the Jews. There was just the small problem of people who were living there for generations after the Jews were first pushed out centuries ago.
You can probably find countries willing to take in Jewish refugees if Israel were to dissolve, but no country on Earth is willing to cede land to enable the same degree of self-governance that Israel has today. If America or Germany were to cede land to create New Israel, that would only result in the same degree of resentment among the generational occupants of that territory that the Palestinians feel today.
Forcing another diaspora and relegating the Jews back to being just a minority group scattered across dozens of countries is asking for the same conditions that led to all of the forced migrations, pogroms, and holocaust which necessitated the establishment of Israel as a sovereign state in the first place.