British was doing just what Roman empire, Rashidune Chalipate or Ottoman empire were doing when they allowed arab people migrate to Palestine land and push jews away from Palestine due to jizya and persecution then change the Palestine demographic gradually.
The difference: British didn't impose sort of jizya to arab Palestine and pushed out arab from Palestine.
The State of Israel was established in 1948, and its legitimacy is recognized by a significant number of UN member states. Israel is a member state of the United Nations and has diplomatic relations with many countries.
The right of Jews to immigrate to Israel is also affirmed in the Universal Declaration of Human Rights, which recognizes the right to freedom of movement and residence within the borders of each state and the right to leave any country, including one's own, and return to one's country.
The root cause of this problem is: because you reject the existence of Israel and keep waging war on them.
He is wrong and doesn't speak reality.
There are 2 Palestinian: arab palestinian and jews palestinian which were 33% of total Palestine population in year 1947.
en.wikipedia.org