But as I stated, you have seen Me and still you do not believe.
36. But I have told you. He now reproves them for wickedly rejecting the gift of God, which is offered to them. Now, that man is chargeable with wicked contempt of God, who rejects what he knows that God has given him.
Whether this conference was with the Capernaites, in whose synagogue Christ now was, or with those who came from the other side of the sea, is not certain nor material; however, it is an instance of Christ's condescension that he gave them leave to ask him questions, and did not resent the interruption as an affront, no, not from his common hearers, though not his immediate followers.
Commenting on John 6:28-59
All that the Father giveth me,.... The "all" design not the apostles only, who were given to Christ as such; for these did not all, in a spiritual manner, come to him, and believe in him; one of them was a devil, and the son of perdition; much less every individual of mankind: these are, in some sense, given to Christ to subserve some ends...