The emboldened part above doesn't ring true to me.
I see
Psalm 110:1 being fulfilled, not as a means of destruction, but of salvation.
Consider:
Jesus is quoted in more than one place teaching us to love our enemies (
Matthew 5:44,
Luke 6:27 & 35).
Is He not the standard? Are we expected to love our enemies, but Christ is exempt from His own teaching (See and compare, e.g.
Romans 12:20)?
Secondly, Paul makes the following claims:
Romans 5:10,
Colossians 1:21,
Paul is pretty clear than humanity in general, at least at the first, are enemies of Christ and God, but individually, across the expanse of time, as the Gospel is heralded, and people receive and obey it, those who were once Christ's enemies become His friends, even His brothers, members of His family and the household of God.
This being the case, compare the footstool language of
Psalm 110:1 with the following verses:
1 Chronicles 28:2,
Psalm 99:5,
Psalm 132:7,
Lamentations 2:1,
All four of these verses indicate that the footstool of the LORD is merely a reference for the temple.
Lamentations 2:1, especially, is unmistakably so.
Is it not therefore better to understand the prophecy of
Psalm 110:1 in this light, that the making of, or turning of, the Messiah's enemies into His footstool by YHVH, is the process of conversion through the Gospel whereby enemies of the Lord are brought into the faith and saved from the wrath to come?
Then, it isn't about the destruction of His enemies, and the loss of their souls in Hell, but rather, about the salvation of His enemies, by the atoning blood shed at the cross, and the gaining of their souls for life everlasting in the New Jerusalem.
That seems more in line with a message of hope and reconciliation. If
Psalm 110:1 is about destruction, it looks more like a message of despair and retaliation, such as you appear to have posited it.
At least to me.