The Jews in Jerusalem sent him to be crucified, so maybe not all that much has changed.
The Implication in that sentence is that the jewish people were firstly responsible for the death of christ, and also that this refers to some underlying nefarious murderous aspect to jewish people that the commenter is suggesting persists to the modern day. How else would you read this comment in the context of this conversation? What else could be intended by "so maybe not all that much has changed."
Interesting then that you chose to link modern zionism with jews in ancient Jerusalem. Also interesting is your omission of the term zionist. No, your comment states a continuity from ancient jews to modern ones in the context of the ancient ones having murdered christ. That's anti-semitism. Whether you will openly agree or not isn't particularly relevant.