As for Abbas, it's none of his business if the US embassy is moved to Jerusalem, since Jerusalem is NOT his territory and he is NOT an American. What he's doing is international racketeering with his threats.
It is absurd for the U.S. to hedge it’s bets based on the happiness or unhappiness of the Arabs on the West Bank and Gaza.
Move the embassy to Jerusalem and be done with it.
Israel has a documented presence in the city for thousands of years. It was Israel’s capital in ancient times.
I don’t believe it has ever been an Arab capital, though I may be wrong there.
It’s Israel’s and Israel has every right to use it’s land as it sees fit, and we should honor the wishes of the nation where our embassy exists.
Just ahead in the narrative, right before David is anointed in ch. 16, Saul gets word:
1 Sam 15
28. And Samuel said to him, The Lord has torn the kingdom of Israel from you this day, and has given it to a neighbor of yours, who is better than you:
29. And also the Netzach* of Israel will not lie nor change his mind; for he is not a man, that he should change his mind:
*Netzach (נצח), n. "victory, strength, glory"; natzach, nitzach (נצח) v. "TRUMP", overcome, win, be victorious, gain the upper hand, defeat, vanquish, etc.
They have intimidated hundreds of governments over the last 100 years, and...it works!
The US State Dept. is most susceptible to these threats and they always go into the scare mode when Husseini, Nasser, Assad, Sadat, Arafart, PLO, HAMAS, Abbas or (you fill in the blank) wave the saber in the air and say the end is near.
IF the Americans do move the Embassy then it will be in West Jerusalem so what do the Arabs care? Officially, they say they are for a Two-State Solution (utter lie) with a divided capital, west for Jews, East for PLO. The truth is, is that they want it all and an American move would mean recognition of WEST Jerusalem belonging to the Jews but, NOOOOOOOOOOOOOOOOOOOOOOOOOOO, that is way too much for the PLO to accept, hence, the threats.