I think "vanguardist" is a better term than "elitist". "Elitist" connotes a passive enjoyment of privilege, whereas these people see themselves much more as the enlightened few bringing the orthodox[1] to the unwashed masses by any means necessary. They share far more in common with Communists who viewed it as their duty to shepherd the proletariat towards social consciousness than with the Oxbridge set who merely take what's "rightfully" theirs without a second thought.

[1] in the literal, etymological sense