Even now, scholars haven't determined the reason for the rampage. The Muslim version was that a Jew was drunk and insulted Islam. The Jewish community disputed that. What is undeniable is that the Arabs hated the Jews and any excuse was enough for them to massacre their innocent Jewish neighbors.
What is also undeniable is that this attack had nothing to do with Zionism.
The JTA quotes here were incomplete and whitewashed the real horror: "A scene of utter desolation and horror, of Jewish girls with their breasts cut off, of little children with numerous knife wounds and of whole families locked in their homes and burned to death."
Arabs and Muslims love to claim that Jews lived in peace and harmony with them until Zionism. That is garbage. The Jews always knew that they were second class citizens and that one wrong move could spark a pogrom like this one.
Notice also that even in 1934, the media would "both sides" a massacre of Arabs to Jews, claiming it was fighting between two sides and not a one sided massacre.
This was not the only Muslim pogrom of Jews in 1934. Only two months earlier, in the Thrace region of Turkey, Jews were attacked mercilessly and some 15,000 were forced to flee the area.
It is considered poor taste to mention Muslim antisemitism nowadays. All hate of Jews is assigned a "logical" excuse, Israel. But until you understand that antiemitism among Arabs and Muslims pre-dates Israel and Zionism by centuries, you cannot understand what is euphemistically called "anti-Zionism" by today's Arabs and Muslims.
The final official death toll in Constantine was 34 Jews.