It is not that I “regard” Mary as not in the linage of David. It is the fact that Mary is absolutely not shown anywhere in the Bible ( or anywhere else) as in the linage of David. That is made up to try desperately to explain the error and conflict in the two linages of “JOSEPH”— one in Matthew 1 and the other irreconcilable history written in Luke 3:23. But even if ,in fact, they were the same written linage— it would be irrelevant to the blood line of Jesus since His Father is GOD. People that do nor accept God as the Father of Jesus go to Hades (oblivion)and have no eternal life anywhere.
Okay.
So, notwithstanding the prophecies dictating that the Messiah was to come from the House of David, here’s a seemingly unrelated question: how do you know that the Gospel of Matthew was written by the Apostle Matthew?