Danika intensely dislikes members of a certain ethnic group. no matter what, she seems to find articles and videos and websites that reflect her beliefs, but seems impervious to those that might counter her beliefs. her behavior is typical of

The answer is confirmation bias.

Confirmation bias is our tendency to cherry-pick information that confirms our existing beliefs or ideas. Confirmation bias explains why two people with opposing views on a topic can see the same evidence and come away feeling validated by it. This cognitive bias is most pronounced in the case of ingrained, ideological, or emotionally charged views.