You mention mountains of evidence, yet you do not provide a single link.

But since i know UN-watch. It is a pro Israeli propaganda organization and not an independent NGO. They were even organisationally intertwined with the world jewish council and other pro Israeli lobbies. They almost exclusively focus on discrediting UNRWA. They cannot be considered a neutral source.

But your claim that UNRWA would be a terrorist organization then gets entirely absurd. Terror means to employ violence to achieve political goals. so the term "terrorist organization" defines an organization that has political goals and primarily employs violence to achieve them. Neither has UNRWA poitical goals, nor is there any credibility to the claim, the organization would engage in violence. It cannot always be excluded, that some UNRWA employees may have done so. But neither did they do it in the capacity of the organization, nor did they make up a relevant number of the UNRWA employees.

Of course if there is credible evidence that UNRWA employees have engaged in illegal activities that needs to be investigated and if the claim should hold true, there needs to be consequences.

But destroying UNRWA like you demand, only serves to commit genocide to the Palestinians in Gaza by destroying the only organization that currently can provide a bare and insufficent minimum of humanitarian aid to millions of starving people. It is in direct violation of the ICJ ruling that demanded Israel to take actions to provide adequate humanitarian aid, and it shows with what can only be described in the "banality of evil" how Israel is set to continue the destruction of the Palestinian people.