What conflict of cognitive dissonance does To Kill a Mockingbird has?

[SPOILER ALERT] One instance: Towards the end of the story, Scout has that conflict in her mind for a short time. She used to know Boo Radley was scary and bad, but how could someone like that save her and her brother from the jerkhole who tried to abduct them?

By the way, don't just copy and paste my answer into your homework or I'll send boo radley after you.