Because the "respect" is misplaced and without warrant from the Word of God. Nowhere in the Bible are we told to keep Jesus "original Aramaic" name out of respect. If that were the case the God would have been more circumspect in actually recording the Aramaic form of that name for us in His infallible Word.
He did not. As you have admitted there is dispute about the original spelling. Not one with the authority of "thus saith the Lord" can tell us for sure.
This reminds me of the Roman Catholic doctrine of works of supererogation. In this case it is a form of "holiness" beyond what God asks for in His word. Jesus attacked the false pietists of His day.
"Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you; and lo, I am with you always, even to the end of the age."
Nowhere in the Bible are we told to call ourselves by the name of John Calvin either. And you misunderstand the direction of my respect in this instance: I am showing my respect for the Messiah's essential Jewishness by using His Jewish name. And that, of course, is what bugs you.
Not one with the authority of "thus saith the Lord" can tell us for sure.
No, but with the authority of "thus saith the Lord," I can tell you how it wasn't pronounced.
Jesus attacked the false pietists of His day.
He attacked those who in their supposed "piety" went around judging others on the basis of their extra-Biblical traditions. So far, you're the one in the seat of the pharisees here; I've judged no one.
"Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you; and lo, I am with you always, even to the end of the age."
Really? All things? "Think not that I am come to destroy the Torah, or the prophets: I am not come to destroy, but to fulfil. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the Torah, till all be fulfilled. Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven." (Mat. 5:17-19)
So can we expect you to join us in keeping the command of the Torah to observe Yom Teruah this weekend? And will you be joining us on the Biblical Sabbath? No? Then don't get on me about keeping traditions and personal customs that aren't in conflict with all of God's commands.