You act like this is some sort of new controversy.
David's salvation was in controversy even as far back as when Dante wrote "Paradise", as he directly weighs in on the matter there.
The Bible is clear King David never went to hell
acts 2:
25 “King David quoted Jesus as saying:
‘I know the Lord is always with me. He is helping me. God’s mighty power supports me.
26 ’No wonder my heart is filled with joy and my tongue shouts his praises! For I know all will be well with me in death—
27 ’
You will not leave my soul in hell or let the body of your Holy Son decay.
28 ’You will give me back my life and give me wonderful joy in your presence.’
29
“Dear brothers, think! David wasn’t referring to himself when he spoke these words I have quoted, for he died and was buried, and his tomb is still here among us. 30
But he was a prophet, and knew God had promised with an unbreakable oath that one of David’s own descendants would be the Messiah and sit on David’s throne. 31
David was looking far into the future and predicting the Messiah’s resurrection, and saying that the Messiah’s soul would not be left in hell and his body would not decay. 32 He was speaking of Jesus, and we all are witnesses that Jesus rose from the dead.
33 “And now he sits on the throne of highest honor in heaven, next to God. And just as promised, the Father gave him the authority to send the Holy Spirit—with the results you are seeing and hearing today.
34
“No, David was not speaking of himself in these words of his I have quoted, for he never ascended into the skies. Moreover, he further stated, ‘God spoke to my Lord, the Messiah, and said to him, Sit here in honor beside me 35 until I bring your enemies into complete subjection.’
Acts 13:34 “For God had promised to bring him back to life again, no more to die. This is stated in the Scripture that says, ‘I will do for you the wonderful thing I promised David.’ 35 In another Psalm he explained more fully, saying, ‘God will not let his Holy One decay.’ 36
This was not a reference to David, for after David had served his generation according to the will of God, he died and was buried, and his body decayed. 37 No, it was a reference to another—someone God brought back to life, whose body was not touched at all by the ravages of death.
In Mormon Doctrine we have the answer that it wasn't David in Psa 16:8 under Corruption
Corruption is also used to signify the decay and change that will take place after death. Thus David recorded the Lord's promise that he would not suffer his Holy One to see corruption (Ps. 16:10), a promise amply fulfilled in Christ as both Peter (Acts 2:27) and Paul (Acts 13:30-37) testified.
3. The term is further used with reference to the wicked, depraved, and dissolute acts of those who are steeped in iniquity. "He that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting," Paul says (Gal. 6:8); and it is by thus sowing to the Spirit that the saints have "escaped the corruption that is in the world through lust." (2 Pet. 1:4.)
Acts 13:
34 “For God had promised to bring him back to life again, no more to die. This is stated in the Scripture that says, ‘I will do for you the wonderful thing I promised David.’ 35In another Psalm he explained more fully, saying, ‘God will not let his Holy One decay.’ 36
This was not a reference to David, for after David had served his generation according to the will of God, he died and was buried, and his body decayed. —someone God brought back to life, whose body was not touched at all by the ravages of death.
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· Acts 13:22
22 And when he had removed him, he raised up unto them David to be their king; to whom also he gave testimony, and said,
I have found David the son of Jesse, a man after mine own heart, which shall fulfil all my will.
· 2 Timothy 2:8
8 Remember that Jesus Christ of the seed of David was raised from the dead according to my gospel:
