From the Abstract:
Probably not really surprising to a lot of people and many have personal experience to back it up, but it's nice to have some data to support that.Most Whites, particularly socio-political liberals, now endorse racial equality. Archival and experimental research reveals a subtle but reliable ironic consequence: White liberals self-present less competence to minorities than to other Whites—that is, they patronize minorities stereotyped as lower status and less competent.
Conservatives think not being racist is not making a priori judgements on individuals based on race, while liberals think what matters is the diversity of artists on your Spotify play-list and how many minority journalists you follow and reTweet on Twitter. It's not surprising that liberals have this completely patronizing attitude.