dismiss (someone or something) as (something)
To reject someone or something by viewing or designating it in a particular way. The studio may dismiss me as a dumb blonde, but I'll show them how versatile an actress I can be! The candidate dismissed the negative report about him as a total fabrication.
dismiss something as something
to put something out of one's mind or ignore something as something. (The second something can be a noun or an adjective.) I dismissed the whole idea as foolishness. It was not possible to dismiss the whole matter as a one-time happening. Molly dismissed the whole event as accidental.