There’s also one other observation I have about why Tobit conflicts with the rest of the Bible.
The Bible is singularly different from the writings of other ancient people in that its references to uncanny powers and magical arts are all condemnatory. Nowhere does it recommend “white” magic to cancel spells of “black” magic. Rather, it urges faith, prayer, and trust in YHWH as the protection against unseen “wicked spirit forces” and all their related activities, including magical influences. (Eph 6:11-18) In the Psalms the righteous pray for deliverance from evil; Jesus taught us to pray for deliverance “from the wicked one.” (Mt 6:13) The Talmud and the Koran, on the other hand, give way to superstition and fear. The book of Tobit contains several passages which encourage magic-working sorcery.—Tobit 6:5, 8, 9,*19; 8:2,*3; 11:8-15; 12:3;
You have a lot of built in bias at work in your analysis and have no understanding whatsoever of the book in question. The book of Tobit has a great deal of symbolism within it. What you consider to be “magic” is actually symbolic and certain ritual like actions are done as obedience and a sign of faith. This book is not unlike the wisdom literature of the OT. There is far too much for me to comment on and I would suggest that you get a Catholic commentary to understand the book.
You are incorrect in stating that the rest of the OT always condemns what you seem to think is related to “magic.” Please recall the incident in the book of Numbers when the people were being bit by serpents. Moses was instructed by Yahweh to make a fiery serpent and to put it on a pole for all of the people to look at. Moses then made a bronze serpent as instructed. When the people that were bitten by the serpents looked at the bronze serpent on the pole they lived. This sounds pretty superstitious when using your standards.
Likewise, many OT practices and commands such as those found in Leviticus seem to be totally superstitious by applying your standards. Try this one:
Lev 1:10-17
"If his gift for a burnt offering is from the flock, from the sheep or goats, he shall offer a male without blemish; and he shall kill it on the north side of the altar before the Lord, and Aaron’s sons the priests shall throw its blood against the altar round about. And he shall cut it into pieces, with its head and its fat, and the priest shall lay them in order upon the wood that is on the fire upon the altar; but the entrails and the legs he shall wash with water. And the priest shall offer the whole, and burn it on the altar; it is a burnt offering, an offering by fire, a pleasing odor to the Lord. “If his offering to the Lord is a burnt offering of birds, then he shall bring his offering of turtledoves or of young pigeons. And the priest shall bring it to the altar and wring off its head, and burn it on the altar; and its blood shall be drained out on the side of the altar; and he shall take away its crop with the feathers, and cast it beside the altar on the east side, in the place for ashes; he shall tear it by its wings, but shall not divide it asunder. And the priest shall burn it on the altar, upon the wood that is on the fire; it is a burnt offering, an offering by fire, a pleasing odor to the Lord.”[See also Lev 3:3-17, and many others.]
By your standards this is a set of superstitious practices. You accept the Book of Numbers and you accept the Book of Leviticus. I do not see why your criticisms of Tobit should invalidate its canonicity without invalidating these other two books or even others in the OT.
It would be very helpful for you to study the book of Tobit using a good Catholic Biblical commentary. You and I are simply not qualified and educated enough to do without a commentary for most of scripture anyway. You somehow are operating on the assumption that you can appreciate the book of Tobit without a good commentary. I think this is a recipe for failure and misunderstanding.
Please be advised that Augustine and Ambrose both supported it as inspired and that the 4th century Councils of Carthage, Hippo, and Rome all considered it to be inspired. Somehow, I do not think that your view is supported by the historical view or by your personal analysis.