As well-meant as his words were, he is reinforcing the myth that there were no Jews in Israel until right after the Holocaust, and then they just suddenly moved in and shunted aside the poor Palis.
In fact, Jews were living in Israel for thousands of years prior to 1948, and our numbers began increasing dramatically during the 19th Century. The push for independence began during the Holocaust, because England was refusing to allow more than a few thousand Jews into the country while millions were being slaughtered. But not all, or even most, Israelis are descendants of Holocaust survivors, simply because not all that many survived. About half are descendants of refugees from Arab countries.
This is what was promised by Great Briton.