He is right in saying that the palestinian un statehood bid is doomed to fail. But he is wrong in saying that by dumping the Jews in the sea will resolve the issue. This last solution was tried by similar islamo-facists regimens to the one now in teheran and also didn't work. If there would be a solution it will come from direct negotiations by the parties involved.
from the article: Iran Supreme Leader: Palestinian UN statehood bid doomed to fail