Like any good teacher Jesus is not hiding from the disciples what is coming. This short term experience is getting them ready for their life long ministry in which they will establish a church for the whole world. And the mild opposition they now face will be ratcheted up.
Too many of us dream about what we might do for the kingdom without ever learning to be faithful in everyday small things. Like learning to share your faith with family and friends. Like serving others in some way at church. Like volunteering when there is a need.