From the linked article:
UNRWA played a direct role in the October 7 attacks.
The agency permitted its facilities in Gaza to be used as command-and-control centers, and as places to hide both combatants and weapons.
Several hundred staff members of UNRWA were discovered by the IDF, from documents it seized in Gaza, to be full-fledged Hamas members.
Dozens of UNRWA staff accompanied the 6,000 Hamas operatives who smashed into Israel on October 7, 2023, and they participated in the atrocities committed that day, of rape, torture, mutilation, and murder.