Snobs and snobbism

In an irritating article on Gore Vidal that I found on The Independent's website, I came across a word I couldn't forget:

"In his memoirs, rarely for a North American, it is sometimes possible to discern snobbery – or as Vidal prefers to say, 'snobbism' – of an almost English intensity."

Does this mean a person indulging in snobbery is a 'snobbist'?