The palm branches and the shouts harked back a century-and-a-half to the triumph of the Maccabees and the overthrow of the brutal Antiochus Epiphanes, the Saddam Hussein of his day. In 167 B.C. Antiochus had precipitated a full-scale revolt when, having already forbidden the practice of Judaism on pain of death, he setup, right smack in the middle of the Jewish temple, an altar to Zeus and sacrificed a pig on it. Hard to imagine a greater slap in the religious face to good Jews. Stinging from this outrage, an old man of priestly stock named Mattathias rounded up his five sons, all the weapons he could find, and a guerrilla war was launched. Old Mattathias soon died, but his son Judas, called Maccabeus (which means "hammer"), kept on and within three years was able to cleanse and rededicate the desecrated temple.
"Mission Accomplished?" Well, it would be a full 20 years more of fighting, after Judas and a successor brother, Jonathan, had died in battle, that a third brother, Simon, took over, and through his diplomacy achieved Judean independence. That would begin a century of Jewish sovereignty.
Of course, there was great celebration. "On the twenty-third day of the second month, in the one hundred and seventy-first year, the Jews entered Jerusalem with praise and palm branches, and with harps and cymbals and stringed instruments, and with hymns and songs, because a great enemy had been crushed and removed from Israel." So says the account in I Maccabees - a story as well known to the crowd in Jerusalem that day as George Washington and the defeat of the British is known to us.