The first sees ideology as the partisan manipulation of attitudes and beliefs. By this definition multiculturalism is either an ideology of others or, conversely, a device for unmasking the anti-multiculturalist ideology of others. In the second sense, ideology is a complex of alternate understandings of reality.
A linking verb is a verb that describes the subject by connecting it to a predicate adjective or predicate noun. It does not describe a direct action taken by the subject.