Why does the person who died 2,000 years ago have everything to do with us?
Jesus has everything to do with us because He was not merely another man, prophet, or martyr; He was the Creator God. Only the Creator God could purchase man's salvation. Therefore people must be brought to understand who He truly is, rather than dismissing Him as merely human.
Les explains that the reason the person who died 2,000 years ago still matters is that He was not just another man, prophet, individual, or martyr. If people think He was merely a man, then of course He cannot have anything to do with them. But He was the Creator God, the One who alone could purchase man's salvation. Les emphasizes that people must be made aware of this. In the Acts 8 context, Philip used the Old Testament and preached Jesus from the same Scripture, showing that the truth about Him was already present in Scripture even before the New Testament was written. The eunuch's response indicates Philip had told him that Isaiah 53 spoke of Jesus, who had been put to death and raised, and that Israel was called to repent, especially of the sin of crucifying Him.