I heard about 190.

190/30.000 is 0.6%. plus they need to still provide definite proof that these people are indeed involved in acts of terrorism. And for the record that's 0.6% of their total number of employees.

Do you seriously think that in any company/organization of this size there aren't a couple of rotten apples?

Plus what is the alternative to UNRWA at the moment? Who is going to distribute the humanitarian aid in Palestine if UNRWA has to close? Or are you implying that all the Gazans are terrorists, including the newborns, etc. and that they all deserve to starve?

Ummm. Source?