First to your comment that "he didn't come when he predicted he would - in that very generation in which his apostles lived" please check out our article: This Generation
The answer to your "tribal lineage" comment is as follows:
In Matthew 1:1-16 and Luke 3:23-38 we are presented with two genealogies of Yeshua. On the surface these different listings would appear to be a contradiction in the scriptures. Not only are the two genealogies listed in the reverse chronology from each other, but the genealogy found in Matthew's gospel is the lineage of Yeshua's mother, Mary, while the genealogy found in Luke's gospel is the lineage of Yeshua's earthly father Joseph. (Note: this is completely opposed to most teachings! But there is no doubt that Matthew's genealogy is that of Mary, and not her husband Joseph, as is usually assumed.) See our recent blog post: Explaining the "two Josephs"...
However, many people fail to realize or address a major problem associated with the genealogical listing found in Matthew's gospel - The lineage of Mary. Once you have established that the line is indeed Mary's, you must deal with a second difficulty: The rights of the line are NOT passed through the mother; but rather, through the father. Even though Mary, through her lineage, was of the Davidic bloodline (as was her husband, Joseph - Luke 3:23-38), she should be excluded from being able to pass those rights of the bloodline because she was female (Deuteronomy 21:16).
So, it is not enough to prove that Mary was an unblemished descendant of David; she had to be a male to transfer the rights. Therefore, she would be disqualified to transfer the rights to her son Yeshua - EXCEPT for a little known exception to the rule.
In Numbers 26 we are introduced to Zelophehad. Zelophehad, we are told, had no sons; only daughters. In Numbers 27, following the death of Zelophehad, the daughters of Zelophehad came before Moses and argued their plight. Because their father had died with no sons, all of their rights of inheritance were to be lost and they felt this was unfair. So Moses prayed to YHWH and He gave Moses an exception to the rule!
Numbers 27:8 Moreover, say to the people of Isra'el, 'If a man dies and does not have a son, you are to have his inheritance pass to his daughter. 9 If he doesn't have a daughter, give his inheritance to his brothers. 10 If he has no brothers, give his inheritance to his father's brothers. 11 If his father doesn't have brothers, give his inheritance to the closest relative in his family, and he will possess it. This will be the standard for judgment to be used by the people of Isra'el, as ADONAI ordered Moshe.'"YHWH told Moses that the inheritance CAN flow through a female, IF they fulfill two requirements: There must be no male offspring in the family (Numbers 27:8) and if the female offspring should marry, they must marry within their own tribe (Numbers 36:6).
Now, returning to Mary. On the surface she should be unable to transfer the rights to her Son. But when you research you find that Mary had NO brothers, she was of the line of David, AND received the inheritance of her father because her father had no sons, AND Mary did indeed marry within her own tribe to Joseph.
End of argument!