Here's just a few others who agree with Mamdani's characterization:
United Nations Independent International Commission of Inquiry on the Occupied Palestinian Territory, including East Jerusalem, and Israel
UN Special Committee to Investigate Israeli Practices Affecting the Human Rights of the Palestinian People
UN Special Rapporteur on the situation of human rights in the Palestinian territories occupied since 1967 (Francesca Albanese)
Amnesty International
Human Rights Watch
Médecins Sans Frontières (Doctors Without Borders / MSF)
Lemkin Institute for Genocide Prevention
Genocide Watch
International Association of Genocide Scholars (IAGS)
B’Tselem
Physicians for Human Rights Israel (PHRI)
Oxfam
Islamic Relief Worldwide
ActionAid International
CARE International
Save the Children International
Norwegian Refugee Council
Médecins du Monde
UNRWA
Al-Haq
Al Mezan Center for Human Rights
Defence for Children International
Palestinian Centre for Human Rights
Medical Aid for Palestinians
Scholars (including Israeli scholars):Raz Segal
Omer Bartov
Amos Goldberg
Shmuel Lederman
Ilan Pappé
Yoav Di-Capua
Francesca Albanese
Melanie O’Brien
Martin Shaw
Uğur Ümit Üngör
Enzo Traverso
William Schabas
A magnitude 6.2 earthquake took place in the Eastern Mediterranean Sea at 22:51 UTC (3 minutes ago). The depth was 14km and was reported by EMSC. #earthquake#earthquakes#Sitia#Greece