When Jesus made predictions about his death and resurrection, he wasn’t doing so just to warn the disciples in advance. They recalled what he had said after his death and resurrection, and believed the scripture and the words that Jesus had spoken. — John 2:22
It’s tempting to scoff at the disciples for their weak faith and ignorance. But to do so is to miss the point: we’re no different.
It is a good thing that Jesus showed patience to them and demonstrates even greater patience in dealing with us.