Wednesday’s rally occurred in the aftermath of the previous day’s explosion at al-Ahli Arab hospital in Gaza, which killed hundreds of civilians. Israel was originally blamed for the strike, but US and Israeli officials have contested that report, saying it was more likely a failed rocket fired by a militant group within Palestine.
More on the failed rocket analysis: https://www.theguardian.com/world/2023/oct/18/al-ahli-arab-hospital-piecing-together-what-happened-as-israel-insists-militant-rocket-to-blame