The statement '@bbaLL_jones @Columbia 💚' is a reply in a conversation thread that originated with a contentious political statement involving Jill Stein confronting a Zionist at Columbia University. The statement itself, however, does not substantively engage with the public issues or debates initiated by the original post. It appears to be a simple expression of support or solidarity, lacking substantive content related to the public discourse initiated by Jill Stein's actions and statements. Therefore, it does not constitute public discourse as it does not contribute to civic dialogue or address societal issues or policies in a meaningful way.