Based on the Orthodox Judaism and the Old Testament, are Ben David and Ben Yosef the same?
Yes and No:
NO: By the Orthdox intepretation whereby the two are different and distinct individuals - unrelated but important for expected prophetic fulfillments.
YES: By Prophetic Fulfillment, the TWO could very well be the same through the Divinity of Yeshua and His Resurrection back to life after being crucified - with the prophetic completion of ben David to take place when Christ returns to establish the Millennial Kingdom on earth! Yeshua returns as ben David as well. I have no doubt at all: Yeshua is the Jewish Moshiach - One & The Same; ben Yosef and ben David.
Consider: During the time of Yeshua, Orthodox Judaism wanted to have ben Yosef be an aggressive military leader who would vanquish Rome and all the enemies of Israel and set up Jewish political, social and religious rule throughout the land. Then he would be killed before ben David could come and set up God's Kingdom.
Yeshua was learned in the Torah as they concurred, but His pacifism and claim to be the Son of God did not set well. According to "Orthodox Judaism" Yeshua was a blasphemer, thus, the pronouncement that He should receive Capital punishment.
Based on the Orthodox Judaism and the Old Testament, what is the time fram between Ben Yosef and Ben David?
The Orthodox Judaism time frame is not necessarily God's timeframe. That is what has gotten many people into trouble; trying to do things, expect things and make things happen before God wills it to be. Orthodox Judaism awaits ben Yosef to appear
first, be killed in battle and, shortly thereafter, ben David makes His appearance to establish God's rule from Jerusalem. At that time, the swords will be turned to plowshares and the wolf and the lamb will cozy up with each other with no fear on the part of the lamb being eaten.
Based on the Orthodox Judaism and the Old Testament, what justificaiton is there for Jesus' not completing all the tasks defined in the Old Testament as proof of the True Messiah, and having to rely upon a Second Coming?
When Yeshua was crucified, His Atoning Blood was shed as a covering of forgiveness for all that generation and the generations of mankind that are to be up to His Second Advent. This, in God's way, fulfills what was known to happen to Moshiach ben Yosef when Yeshua was physically (not spiritually) killed by crucifixion.
The Second Advent, correlates to the Orthodox second appearance of a Moshiach; ben David. That is when the world is brought to a restoration of peace and when Israel is truly the center of God's Kingdom.
Orthodox Jewish leaders were upset that Yeshua didn't make it happen when they wanted it to happen
2000 years ago. Had that happened then, you and I wouldn't be having this discussion of Salvation through the Atoning Blood of Yeshua that is offered to mankind.
Couldnt just say "Yes I am a Christian" could you?
So you are saying you a Christian had a similar revelation as Rav Kuduri. By definition both of you are Christians
Anyone can claim to be a "Christian" and still not really be in accord with the True teachings of Yeshua. Mormons claim to be "Christians" but their theology is not in agreement with the context of the New Testament Yeshua.
Same with Jehovah's Witnesses; their version of Yeshua is not the One of the New Testament.
So. again, to answer your question: You may refer to me as a "Christian" but the New Testament defines followers and believers in Yeshua as Children of God. There is no longer a divisive denominational label. When it comes to mankind, people are either Children of God through faith in the Atoning Blood of Yeshua - or they are not.