No single event, Jews had wished to return to their ancestral lands to rejoin the Jews remaining there since the Roman expulsion.
There was no particular issue that caused Zionism as a movement. Theodor Herzl, the founder of the movement, was motivated quite strongly by the Dreyfus Affair in France. Other Zionists were motivated by other rationales or events. The worldwide (Non-Jewish) community finally embraced the Jewish Right to a State after the realization of how extensive the Holocaust was.
The assassination of Archduke Ferdinand was the one event that pushed Europe over the edge and brought about World War I.
It is considered to be a event for the jewish and other people because the escape of the hebrews from egytian slavery
The bombing of Pearl Harbor
Only Jews celebrate Channukah because it is a Jewish holiday that commemorates an event in Jewish history.
The attacks on September 11
Subduction.
Circumcision
No such event. Within eight days, all male Jewish babies have a circumcision and all female Jewish babies having a baby-naming.
Was supposed to be feb 28th and it is now pushed back one week.
It was not a specific event. Resistance appeared where there was oppression.