Jesus said to them, "Truly, truly, I say to you, before Abraham was, I am."
This is an undiminished claim by Jesus to be God. He was appealing to the oldest roots of Judaism in this claim. He used the covenant name of God as revealed to Moses (“I am”) and He claimed to exist before Abraham, the father of the nation of Israel. It is very clear that the authorities understood what Jesus was claiming because they take immediate steps to stone Him for His blasphemy (John 8:59).
This is the part of Jesus that people still want to resist. It is OK to keep Him as a moral leader, as a great human or an enlightened teacher. But to ascribe to Him the authority and reality of God (which He claimed and demonstrated) is not what post-modern inclusivism wants to do. Instead, the system attacks the gospels as a trustworthy account of His life and teaching (leaving us with nothing by which to know Jesus) and blames His followers for deifying Him.
But Jesus clearly changed lives, backing up this claim. And those who saw Him and say and do what only God can do chose instead to hate Him. Why should it be different today? Accepting Christ as God and Savior has always been a personal commitment that is ridiculed by the world. But His is my salvation and life, and I know this!