In John 12:27-50, we have Jesus' final appeal to the world before spending his final days focused on his disciples. After explaining the meaning of his death, he also explained why so many did not believe in him. Then he summarized his teaching in his last words to the crowds, giving them one final opportunity to believe in him. (sermon notes)
As opposition grew toward Jesus, he anticipated that it would reach his followers as well and prepare them for how to live.
Because they questioned and rejected Jesus’ authority, the chief priests were removed from their post and replaced by others from all the nations.
Sooner or later every kingdom that opposes God will be “all gone,” but there is a kingdom that will not pass away.