I’m not sure how to define the word racist.
In the context it was used in it means any opposition to liberal ideology and its agenda, which, like "homophobic," is meant to avoid facing up to the negative evidence against them by personally disparaging the opposition by relegating them to being driven by an invalid irrational motive, thereby placing the person on the defensive, and thereby validating the liberal.
This can extend to making any judgment based upon race. In the early 1990's in Boston i was handing out gospel tracts in the subway system (when you could still do so rather freely). The Red Line has trains that went to Quincy/Braintree (mostly white) and another to Ashmont station, for Dorchester/Mattapan (mostly black).
A train had just left and a lady coming onto the waiting area asked me which train had just left. I looked down the dock and saw mostly white people and and said i thought it was the Quincy train since a lot of black souls were still there. Her response (and i think she was white) was that this was a very racist thing for a man of God to say.
Likewise, quoting a statistical fact that 72% of black babies are born to single women must therefore mean you also are racist. This is the manner of moral reasoning America has much been deceived into.