A number of leading international Zionist organizations including the Simon Wiesenthal Center and the World Jewish Congress, have initiated a campaign to this effect.
Needless to say, anti-Zionism is no more "racist" or anti-Jewish than anti-Fascism is anti-Italian or anti-Nazism is anti-German. To equate an ethnocentric and openly discriminatory political nationalist movement with the religion or ethnicity of the offending party is just as racist whether committed by true anti-Semites ("all Jews are Zionists and hate Arabs") or by the Zionists themselves ("Zionism represents all Jews, therefore any anti-Zionist expression is against all Jews"). That major elements of the Zionist movement would adopt a racist argument in order to oppose the charge of racism can be no surprise.
If this measure is adopted then it's another nail in the coffin of the UN.