Pride and Prejudice Prejudice Quotes

How we cite our quotes: (Chapter.Paragraph)

Quote #10

This naturally introduced a panegyric from Jane on his diffidence, and the little value he put on his own good qualities. Elizabeth was pleased to find that he had not betrayed the interference of his friend; for, though Jane had the most generous and forgiving heart in the world, she knew it was a circumstance which must prejudice her against him. (55.50)

Okay, but really: is it actually prejudice to not like your brother-in-law for breaking you and your boyfriend up? Or isn't that just good judgment based on observable fact?