Why would someone that cut me out of their life get angry at me for ignoring them?

Friend got told lies about me liking her and ended friendship, ignores me and appears to hate me (other lies were told about me being possessive of her)

Why would she get angry/upset that I’m avoiding her and don’t say anything when we pass each other, I mean she ignores/avoids me, she chose to believe the lies and end friendship?
Why would someone that cut me out of their life get angry at me for ignoring them?
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