Why does Jesus say that the generation of people that are present is an evil generation?

What is wrong with what the crowds are doing? Is it always wrong to ask for God to give you a sign? If so, why? If not, when is it appropriate?

What does Jesus mean when he says that the generation will receive “the sign of Jonah”?

Why does Jesus say that the queen of the South will rise up and condemn that generation? (1 Kings 10, 2 Chronicles 9)

Why does Jesus say that the people of Nineveh will rise up and condemn that generation? (Jonah 1-4)

How is Jesus like Solomon? How is He different? How is He superior to Solomon?

How is Jesus like Jonah? How is He different? How is He superior to Jonah?

What kinds of application is this text asking of us? How is it calling us to respond? What kinds of changes should we be making in our lives, in light of this text?