What would Jesus say to this generation? The same things the Catholic Church is saying. And people would react the same way.
Many Catholics reject or ignore or radically reinterpret the teachings of the Church. If Jesus was teaching today in person, they would react the same way.
The world judges the Church harshly, rejects Her teaching, and ridicules her spiritual life. If Mary were in the world today, she would be treated the same way.
For the Church is the body of Christ, guided by the Holy Spirit.
Mary is an image of the Church, and the Church is an image of Mary.