One of President Trump’s lead Middle East peace negotiators lashed out at the Palestinian Authority on Friday, accusing it of institutionalizing support for terrorism amid a dispute over Israeli tax transfers that make up a significant portion of Palestinian revenues.

Under longstanding accords, Israel makes monthly transfers to the Palestinian Authority from certain taxes it collects related to Palestinians. Last month, Israel announced a freeze on about 5 percent of the tax payout, as punishment for the Palestinian Authority’s policy of paying stipends to Palestinian prisoners in Israel and to the families of Palestinians killed or wounded in confrontations with Israelis.

In response, and despite the authority’s financial problems, the Palestinian president, Mahmoud Abbas, rejected the full tax transfer and vowed to continue to pay the stipends.

On Friday, the Trump administration’s Middle East envoy, Jason D. Greenblatt, accused Palestinian leaders of offering the stipends as a reward for acts of terrorism.