To make the contrast between belief and unbelief even more striking, John returned from Mary's love to the chief priests' hatred (cf. 11:47-57).
12:9 Jesus had disappeared after Lazarus' resurrection and had not yet showed Himself in Jerusalem for Passover (11:54-57), but now the news was that He was in Bethany. The appearance of the resurrected Lazarus intensified the curiosity of many Jerusalem residents and pilgrims who travelled to Bethany hoping to see both men. They were the subjects of much controversy.
Martha had worked for the Lord by serving the supper (v. 2), Mary had worshipped Him (v. 3), and Lazarus witnessed for Him (v. 9). They are model disciples.
12:10-11 The huge numbers of people that were heading for Bethany to see Jesus and Lazarus made the Sanhedrin members conclude that they would have to terminate Lazarus as well as Jesus. Many of the Jews believed on Jesus when they heard about Lazarus' resurrection and or saw him. The man born blind whom Jesus had healed had also become a problem for the Sanhedrin earlier. They had dealt with him differently because Jesus' popularity was not as great earlier (9:34).
The hatred of the Sanhedrin contrasts with Mary's love for Jesus. The intensity of both feelings, shared by many other people, pointed to the inevitability of a major conflict soon.