No, it’s not. Here is a link to several Orthodox Jewish organizations that are anti-Zionist: http://www.jewsnotzionists.org/organizations.htm
There are also many leftwing secular Jews who are anti-Zionist.
While Jewish identity doesn’t depend on the existence or nonexistence of modern Israel, Modern Israel,IMHO, should be treated as a valuable ally and recognized as vastly more civilized than its Muslim neighbors. This seems to be the exact opposite of the Obama Administration’s current Middle East policy. In fact, the Obama Administration strikes me as a clear and present danger to Israel and peace in the ME.
Prior to the creation of Israel, antizionism was legitimate. Afterward it leads to the death of Jews.