@SlimBoyFat
The fact that John used both the term: "Son of God" and "God" in the same book to refer to Jesus tells us that both are referring to Jesus' deity. But it is not only John, but Jesus' enemies as well understood the term "Son of God" to be a reference of his deity.
During His trial, the High Priest demanded of Jesus, “I charge you under oath by the living God: Tell us if you are the Christ, the Son of God” (Matthew 26:63). “‘Yes, it is as you say,’ Jesus replied. ‘But I say to all of you: In the future you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven’” (Matthew 26:64).
The Jewish leaders responded by accusing Jesus of blasphemy (Matthew 26:65-66). Later, before Pontius Pilate, “The Jews insisted, ‘We have a law, and according to that law He must die, because He claimed to be the Son of God’” (John 19:7). Why would His claiming to be the Son of God be considered blasphemy and be worthy of a death sentence? The Jewish leaders understood exactly what Jesus meant by the phrase “Son of God.”
To be the Son of God is to be of the same nature as God. The Son of God is “of God.” The claim to be of the same nature as God—to in fact be God—was blasphemy to the Jewish leaders; therefore, they demanded Jesus’ death, in keeping with Leviticus 24:15. Hebrews 1:3 expresses this very clearly, “The Son is the radiance of God’s glory and the exact representation of His being.”
What is it about Jesus being God that bothered so many people then as it does now?