Are you implying that all those Jews worried about anti-semitism in the Labour Party lack basic sense? I'm not sure they're likely to find that a comforting response.
Are you weasel-wording strawmen? Maybe, don't do that?
First, who are "all those Jews"? This is handwaving to make it sound like multitudes.
Second, people worrying about anti-semitism in the Labour party in general, either lack common sense (if we accept your argument that is "this attitude" I wrote about above that is their concern), or conflate anti-semitism (as in Hitler, Nazis, pogroms, and co) with criticism of actions by the state of Israel.
In fact, actual jews in favor of Corbyn and the party have been accused of "anti-semitism" (!) - like the Jewish Voice for Labour (jewish members of the UK Labour Party, because they are nonetheless critical about the situation with Palestine).
