Tomorrow is the traditional celebration of Palm Sunday, the Sunday before Easter Sunday.
When Jesus entered Jerusalem he was hailed as the new king of Jerusalem. At the time, there was no king in Jerusalem since Herod had died and his son was a lunatic that the Romans wanted nothing to do with.
Jesus would come back to Jerusalem again and again holding court in the temple. People were coming to him with problems and he was solving them, not unlike what Moses did long ago.
The jews (rather, the jewish leaders) were angry with Jesus for one reason and one reason alone: He threatened their power structure. The high priests were well-compensated for their position, and had an influential over both the people and as a delegate to the Roman authorities. (In Roman society, the high priest was considered superior to all other political positions.) The temple itself generated a lot of revenue from its donations and the high priest got to determine how that money was spent.
Then Jesus showed up and started proclaiming himself as the Son of God, and they knew what he was going to do if he was allowed to continue. As the Messiah he would not only become the political king of the jews, but also their chief high priest, bringing in with him a new order of things, not unlike what Moses did.
NEVER FORGET that Jesus is not only the king of the jews, but the king of king and lord of lords. He was welcomed as king not because he had a mighty army but by force of his words alone!
