I love verse one, Jesus was teaching and sharing the good news and the chief priests, scribes and elders were standing around. They were standing around. Loitering scribes, interesting. Clearly they were lurking to see if they could trap Jesus.
I have to say, I wonder about the brains of the vineyard owner. Why would he send his son if the wicked tenants had beaten up or killed everyone he'd ever sent? I love that the scribes knew that he spoke this parable about them. This means they knew that Jesus was the son in the story and that they knew their ancestors had mistreated God's prophets!
I think Jesus' best line ever is, "Render to Caesar what is Caesar's and to God what is God's!" That is as practical today as it was then.