The people listened to him in silence. His words were a shock to their stagnating minds, as it is a shock to a person who is asleep under a wall which is about to fall and who is vigorously awakened. This person may be alarmed and may even become angry although the aim was to save him.
Noah's people were divided into two groups after his warning. His words touched the hearts of the weak, the poor, and the miserable and soothed their wounds with its mercy. As for the rich, the strong, the mighty and the rulers, they looked upon the warning with cold distrust. They believed they would be better off if things stayed as they were. Therefore, they started their war of words against Noah.