MESSIANIC RESPONSE: Where does it say he had to fulfill them within a certain timeframe? He has fulfilled at least 300 of them already, with the rest to be fulfilled upon his return!
1 Peter 1:11 tells of the two comings of Messiah - his coming to suffer and die for our sins, and his subsequent glory.
Both comings are mentioned in Malachi 3:1 - "Look! I am sending my messenger to clear the way before me; and the Lord, whom you seek, will suddenly come to his temple. Yes, the messenger of the covenant, in whom you take such delight - look! Here he comes," says ADONAI-Tzva'ot. 2 But who can endure the day when he comes? Who can stand when he appears? For he will be like a refiner's fire, like the soapmaker's lye. 3 He will sit, testing and purifying the silver; he will purify the sons of Levi, refining them like gold and silver, so that they can bring offerings to ADONAI uprightly. 4 Then the offering of Y'hudah and Yerushalayim will be pleasing to ADONAI, as it was in the days of old, as in years gone by. (CJB)
Mark 1:1. The beginning of the Good News of Y’shua the Mashiyach the Son of Elohim, 2. As it is written by the prophet Yesha’yahu, “Behold I will send my Messenger before your face that he prepare your way. (Malachi 3:1) 3. A voice which cries in the wilderness, ‘Prepare the way of Master YHWH and straighten his paths.’” (Isaiah 40:3) (AENT)
See also Matthew 11:10 where John the Baptist is clearly identified as the messenger of ELOHIM. John was the forerunner of Y’shua haMashiyach. This is clearly a reference to His first coming.
In Isaiah 40:3 we have a similar prophecy, which is fulfilled in Matthew 3:3. John is the voice crying in the wilderness, "Prepare the way of the Lord; make His paths straight.” Please don’t miss this! According to both Tanach prophecies, John the Baptist prepared the way of the Lord, that is, YHWH. In the New Testament John prepared the way for Y’shua. Think about what that means….
Compare Malachi 3:1 to Isaiah 61:1- 2 and its fulfillment in Luke 4: where we read: 18. “The Spirit of Master YHWH is upon me and because of this, He has anointed me to declare hope to the poor. And He has sent me to heal the brokenhearted and to preach release to the captives and sight to the blind. And to free those who are oppressed (by the power of) forgiveness,19. and to preach the acceptable year of Master YHWH. (Isaiah 58:6; 61:1-2)" (AENT)
All of this is related to the first coming of Messiah. When Y’shua read these verses in Luke's gospel, he stopped short. Take another look at Isaiah 61:2, where Isaiah mentioned "the day of vengeance of our God." Y’shua didn't mention that day, because it was related to his second coming. The first time Y’shua came, he did not come to judge the world, but rather to “save” the world by revealing His Father and His Father’s Torah, while proclaiming the Kingdom and doing everything his Father commanded (Luke 4:43 and 8:1). Take a look:
John 6: 35. Y'shua said to them, I am the Bread of Life. Whoever comes to me will not hunger. And whoever believes in me will not ever thirst. 36. But I have said to you that you have seen me, and you do not believe. 37. All who my Father has given to me will come, and whoever comes not to me I will cast outside! 38. For I came down from heaven, not to do my will, but to do the will of Him who sent me. 39. And this is His will, that of Him who sent me, that all that He has given to me I do not lose even one. 40. For this is the will of my Father, that all who see the Son and believe in Him, will have life that is eternal. And I will raise him up on the last day. (AENT)
 As in the context of Miltha (the Word) or the "Manifestation" or the "Will of" YHWH coming down from heaven to do the Will of YHWH upon earth; his Spirit is of YHWH but his nephesh (soul) and body are human and temporal. This shows that Yeshua (the human Messiah with a “divine nature” was NOT in charge; HIS FATHER WAS!
The above refers to YHWH’s promise to send a prophet who was to do everything He ordered him to do – and that is exactly what Y’shua did:
Deuteronomy 18: 15 "ADONAI will raise up for you a prophet like me from among yourselves, from your own kinsmen. You are to pay attention to him, 16 just as when you were assembled at Horev and requested ADONAI your God, 'Don't let me hear the voice of ADONAI my God any more, or let me see this great fire ever again; if I do, I will die!' 17 On that occasion ADONAI said to me, 'They are right in what they are saying. 18 I will raise up for them a prophet like you from among their kinsmen. I will put my words in his mouth, and he will tell them everything I order him. (CJB)
For more on this subject, please read our article: http://therefinersfire.org/proclaiming_torah.htm