There are at least three paradoxes in the Palm Sunday narratives which serve as both admonitions and exhortations for us today:
Those who knew the Scriptures best, the Pharisees, failed to see their fulfillment in Jesus (Matthew 21:15-16 [cp. Psalm 8:2]; Luke 19:39; John 12:19). They would eventually coerce the crowds into changing their minds.
The King rides in on a donkey. He is meek, not the kind of King they expected.
The same crowd who proclaims Jesus King would betray Him in John 19:15: “They cried out, ‘Away with him, away with him, crucify him!’ Pilate said to them, ‘Shall I crucify your King?’ The chief priests answered, ‘We have no king but Caesar’” (cf. Mark 15:13-14; Luke 23:21; John 19:6).