Are you being facetious? I don't think the candidate's favorite music genre is being explicitly used as a job qualification. They're not filtering on it because it's relevant to the job.
The fact that they like country music isn’t the problem, it’s that they thought it was a good interest to put on a resume.
As a resume screener you should calibrate your recruiting process to be empirical. What you're describing doesn't sound empirical at all.