The Donkey & Palm Crosses

The Church’s year approaches its climax as we remember Jesus’ Triumphal Entry into Jerusalem. He rides a donkey and palm branches are waved and strewn at his feet.
Our liturgy says:
“Behold your King comes to you,
O Zion!
meek and lowly,
sitting on a donkey!”
Why Jesus should ride in on a donkey is a subject for debate…