You can’t change Israel’s behaviour by stopping funds, they’d just double down and bankroll stuff on their own. You can get the UN to clean up the UNWRA by suspending funding.
This is the sort of weird logic i’m talking about. You can’t change the action of one country so you continue pouring fund and stand with them and defend them of any wrongdoing. How’s that gonna change anything when everyone is actively encouraging them to do it rather than pulling back support and funding? If it’s another country it will get sanction to hell.
It’s like your 12 years old only know how to throw a tantrum whenever they want something and instead of trying to correct it, you continue to support their behaviour and hope one day they will sort of grow out of it. Spoiler alert: it won’t.