Zechariah 9:9-10 - 9 Rejoice with all your heart, daughter of Tziyon! Shout out loud, daughter of Yerushalayim! Look! Your king is coming to you. He is righteous, and he is victorious. Yet he is humble - he's riding on a donkey, yes, on a lowly donkey's colt. 10 I will banish chariots from Efrayim and war-horses from Yerushalayim. The warrior's bow will be banished, and he will proclaim peace to the nations. He will rule from sea to sea, and from the [Euphrates] River to the ends of the earth.
You quote Zechariah 9:9 and can't see that this describes Yeshua? (Check out 48 Dead-On Messiah Prophecies to see all the prophecies He fulfilled!) According to Daniel, there would be 483 years between the decree to rebuild the wall and the city of Jerusalem in troublesome times before Messiah would be cut off for the sins of the people. Exactly 483 years after the rebuilding of Jerusalem and its walls, Yeshua of Nazareth offered himself to the nation of Israel. He rode into the city on a donkey to the rejoicing of the people, just as the prophet Zechariah had predicted! He was humble, he was righteous, he was everything the Tanach foreshadowed. And he will rule from sea to sea to the ends of the earth when he returns to defeat the antichrist at the battle of Armageddon: See Endtime Questions.
According to mathematician Professor Peter Stoner: The prophecies Yeshua fulfilled are "dead-on" accurate and that the probability of at least 48 Old Testament prophecies about Yeshua being fulfilled in one person is the incredible number of 10^157 power!
Quote from Stoner:
For example, what's the likelihood of a person predicting today the exact city in which the birth of a future leader would take place, well into the 21st century? This is indeed what the prophet Micah did 700 years before the Messiah. Further, what is the likelihood of predicting the precise manner of death that a new, unknown religious leader would experience, a thousand years from now - a manner of death presently unknown, and to remain unknown for hundreds of years? Yet, this is what David did in 1000 B.C.
Again, what is the likelihood of predicting the specific date of the appearance of some great future leader, hundreds of years in advance? This is what Daniel did, 530 years before Christ.
If one were to conceive 50 specific prophecies about a person in the future, whom one would never meet, just what's the likelihood that this person will fulfill all 50 of the predictions? How much less would this likelihood be if 25 of these predictions were about what other people would do to him, and were completely beyond his control?
For example, how does someone "arrange" to be born in a specific family?
How does one "arrange" to be born in a specified city, in which their parents don't actually live? How does one "arrange" their own death - and specifically by crucifixion, with two others, and then "arrange" to have their executioners gamble for His clothing (John 16:19; Psalms 22:18)? How does one "arrange" to be betrayed in advance? How does one "arrange" to have the executioners carry out the regular practice of breaking the legs of the two victims on either side, but not their own? Finally, how does one escape from a grave and appear to people after having died a horrible death?
Indeed, it may be possible for someone to fake one or two of the Messianic prophecies, but it would be impossible for any one person to arrange and fulfill all of these prophecies.