Red lines have PR purposes imo, even if he does cut aid to those countries, it won't be because they voted in favor of declaring his decision null.
Did you see this:
Danny Danon, Israel's Ambassador to the U.N., held up a coin he said is from 67 AD and bears the words -- in Hebrew -- "Freedom of Zion."
He said it is "clear evidence … that proves the ancient connection of Jews to Jerusalem."
"No UNESCO declaration, no empty speeches, no General Assembly resolution will ever drive us from Jerusalem," he said. "These are the facts this body does not want to hear. These are the facts this body wishes to ignore."
my god