I don't see anywhere in Psalm 22 where dust of death refers to all the people. The wars, oppression and exile certainly resulted in the crushing death of many people and the loss of national identity of the nation. I do see in verse 17 a direct reference to Isaiah which makes the image precisely about Israel; I hope you see that.
I do. And I would happily concede that Jesus' life has comparisons with Israel. In which case, it could be argued that Psalm 22 has a meaning at both individual and national level. But you cannot simple ignore the perfect and precise depiction of the events of Jesus' crucifixion in this psalm. Have you read the NT?
2 Corinthians 5:21. 'For he [God] hath made him [Jesus] to be sin for us, who knew no sin; that we might be made the righteousness of God in him.'Oh, so Jesus wasn't holy. Got it.
Isaiah 53:6. 'All we like sheep have gone astray; we have turned every one to his own way; and the LORD hath laid on him the iniquity of us all.'
According to Exodus 12:3 the lamb is to be without blemish. That's just the way Jesus was, yet he bore the sins of many. Hebrews 9:28 'So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.'
This is a hard thing to be certain about, but since the soul of Jesus was without sin, he must have born the sin in his body. That's why the death of his body was necessary in the expiation of sin. The spirit of God departed from Jesus when the sin was born in his body (ie in crucifixion, or punishment upon a tree).