In Matt.21:1-11, we see the spiritual blindness of the Jewish leaders, only days before the crucifixion.

The week began with the triumphal entry:  the only time Jesus ever promoted a demonstration.

Before then, Jesus had not been a public celebrity; he cautioned people not to tell who He was.
 
Why did Jesus plan this demonstration?
The 1st reason: obedience to fulfill prophecy. Zec.9:9

This could only apply to Jesus; He was the only person who could prove He was Israel’s King.

He rode in on a donkey, the transportation of the Jewish royal family. 1 Kings 1:32-34
 
The 2nd reason for the public show:  it forced the hand of Jewish leaders to finally take action.

When they saw the reaction of the crowds, they decided to destroy Jesus. John 11:53, 12:19
 
Prophetic Scriptures required that the Lamb of God be slain on Passover, only 4 days away.

What caused the spiritual blindness that prevented the Jews from recognizing Him as King?
 
Their religious leaders robbed them of the truth, substituting man-made traditions. Luke 11:52

The leaders didn’t care about God’s truth; they guarded their own interests. John 11:47-53

As they resisted truth, their blindness increased – just like the hard-hearted Pharaoh. John 12:35.