He states the obvious. So what?
Is he calling on American Jews to not vote for, or give money to Obama?
Is he deploring the overt antisemitism in the Democrat party?
Unless he calls for something to change, what he has said means little or nothing.
Yes, he is, implicitly, saying that to those American Jews (and other Americans) who respect the Knesset speaker and the position he holds.
You must remember that there is an unwritten rule - or even a taboo - in Israeli politics that no one in the Israeli government can inject himself or herself in a partisan way into an American election. In this instance, the Knesset speaker is pushing that envelope as far as it could possibly go without breaking it. Even at that, I would not be shocked if he were criticized strongly by Jewish 'Rats in the US or by leftists in Israel for his remarks.
In terms of Israel's unwritten rule not to inject herself into American political parties, she may have to break it because the Democratic party does not like the Jewish state anymore.
It is almost as if the Democrat party is mirroring the former Soviety Union in its embrace of antisemitism in its twilight years.