The "right" of return does not exist either in fact or in law, so if what the Prime Minister is asking for is a "concession" it is an easy concession. If the Arabs were sincere about wanting a "Palestinian" state they would be more than happy to make this meaningless "concession". If there is no recognition of the Jewish state then there will be no new Arab or "Palestinian" state either.
Magnitude 6.1 quake hits Panama-Colombia border (Reuters)
from the article: Netanyahu asking Palestinians to cede right of return