Definition of PREJUDICE (Merriam Webster)
a (1) : preconceived judgment or opinion (2) : an adverse opinion or leaning formed without just grounds or before sufficient knowledge
b : an instance of such judgment or opinion
c : an irrational attitude of hostility directed against an individual, a group, a race, or their supposed characteristics
I think we tend to believe minority groups are most targeted for prejudice and any unaccepting attitude is hostile and irrational.
If we really listened to everyone, though, there is a measure of prejudice in us all.