( فَكَذَّبُوهُ) (But they denied him): Despite all of what the Prophet told them, they still denied what he (PBUH) said.
( إِنَّهُمْ كَانُوا قَوْمًا عَمِينَ ) (Indeed, they were a blind people): They were blind in insight, not the blindness of the sight.
The part about Prophet Noah (PBUH) ended. Other details describing the flood and what happened next are found in other Surahs. The context of this Surah is about the honorable Prophets (PBUT).