A coalition politician protested the move citing Tehran’s frequent threats to destroy Israel.
A bipartisan letter claims the measure "would discriminate against virtually all American survivors and heirs."
"Never Again," he said in a speech at the U.S. Holocaust Memorial Museum in Washington, D.C.
The plan, which an unnamed presidential aide compared to the Waze navigational app, provides an outline and has the Israelis and Palestinians fill in the details.
Jan Zaryn of the ruling party suggested the move as punishment for the diplomat's warning against the return of anti-Semitism.
The museum cited her failure, as the country's civilian leader, to oppose the ethnic cleansing and possible genocide of the Rohingya minority.
An attack on Catholic journalist Bogdan Bialek appears to be part of a wave of hate expressions in the country following passage of the measure.
The U.S. Embassy in Poland also reportedly threatened to defund joint military projects over the legislation.
The principality acknowledged its role in the genocide belatedly, but on the personal initiative of its monarch.
Amid an acrimonious debate over a law criminalizing blaming Poland for the genocide, delegation organizers and participants are exploring alternatives to Auschwitz.