The man meant no doubt to be civil, but meant also to imply that for the purpose needed the drawing was good enough, a matter on which he was competent to form an opinion.

Thackeray instantly put the man down as a snob for flattering him.

The little courtesies of the world and the little discourtesies became snobbish to him.

A man could not wear his hat, or carry his umbrella, or mount his horse, without falling into some error of snobbism before his hypercritical eyes.

St.Michael would have carried his armour amiss, and St.Cecilia have been snobbish as she twanged her harp.
I fancy that a policeman considers that every man in the street would be properly "run in," if only all the truth about the man had been known.
The tinker thinks that every pot is unsound.