Lets talk about this claim.
More than half of the Jews in Israel are Mizrahi Jews. Their ancestors have lived continually in the Levant and Near East for as long or longer than the Palestinian population.
An additional 20% are Israeli Arabs, the descendants of Israel’s Arab population who accepted Israel’s invitation to remain in the country on the basis of absolute equality in 1948, instead of fleeing (either to facilitate the Arab invasion, on the basis of Arab propaganda, or simply because they were unwilling to live side by side with Jews).
Almost the entire remainder of Jewish immigrants to Israel were refugees, not settlers. They were kicked out of Europe if they were lucky enough to survive the Holocaust and escape with their lives, or they were purged from the rest of the Middle East in one of the most thorough examples of ethnic cleansing in history.
Even if you consider barely alive refugees with nothing “settlers,” Israelis have nowhere to go back to. Not Europe, where they were nearly exterminated, and certainly not the Arab states they were forced to flee from with nothing.
So what is the argument for calling Israel a “settler-colonial” state?
Only a justification for the slaughter of the Jews.