Some of Jesus" hearers had known Him all His life. More of them had known Him and His family since they had moved to Capernaum where Jesus gave this discourse ( John 6:59). His claim to have come down from heaven seemed to them to contradict what they knew about His human origins. Again they were thinking only in physical terms. It is interesting that the Israelites in the wilderness who received the manna from heaven also grumbled ( Exodus 15:24; Exodus 17:3; Numbers 11:4-6). Mankind"s dissatisfaction with God"s good gifts shows the perversity of the human heart. It was Jesus" claim to a heavenly origin that offended these people, as it had offended the people of Jerusalem ( John 5:18). [source][source][source]
"The Incarnation of the Son of God in Jesus was and remains the great stumbling block in Christianity for the Jews." [1][source]
In his Gospel John often used the term "the Jews" to represent the Jews who opposed Jesus during His ministry (cf. John 2:18; John 2:20; John 5:16). It became something of a technical term as he used it. It often means more than just a racial group in this Gospel. [source][source][source]
The New Testament reveals nothing about Joseph after Jesus" childhood. He passed off the scene then, but statements such as this one suggest that he had lived in Nazareth as Jesus was growing up. Probably Joseph died sometime before Jesus began His public ministry. [source][source][source]