Why didnt the towns people listen to moshe the beadle in the book night?

The townspeople didn't listen to Moshe the Beadle in "Night" because they found his tales of the atrocities in the concentration camps too incredible to believe. They were in denial and couldn't fathom the Horror that was about to befall them. It was only later, when they experienced it for themselves, that they understood the truth of Moshe's warnings.