The rally had separate-gender sections. The much bigger issues with the rally were the hischabrus im reshaim and the chilul Hashem of allowing the Zionists to be their representatives/leader (just like by the Eigel).
The difference between the Zionists who attended that Zionist rally, vs. NK bringing to the gentiles the Torah’s indisputable message that Zionism is not Judaism, is that NK likely believes (and it seems more so than ever that they are right in that belief) that it is literal pikuach nefesh to make sure the gentiles know that Zionism is not Judaism and therefore that the gentiles should not blame the Jews for whatever issue these gentiles might have with the Zionists and their State.