Mildly interesting to note where these Lutherans fall in the discussion of whether John 6 is about the Sacrament of the Altar:
"Ambrose says about comfort: 'Go to Him and be absolved, because He is the forgiveness of sins. Do you ask who He is? Hear Him when He says, 'I am the bread of life; whoever comes to Me shall not hunger, and whoever believes in Me shall never thirst' (John 6:35).' This passage declares that the forgiveness of sins is offered in the Sacrament."