Condescending

The factory representative was very condescending.  He assured the Face of Everyman and management at the Foggy Bottoms Resort and Spa that there was nothing wrong with the security camera.  It seemed to be working properly and perhaps, just perhaps, the kindly ol’ pensioner, in his dotage might not have set the delicate instrument to the proper values.  At those words, bystanders gave a collective gasp in disbelief.