You didn't do anything that hundreds of typical people don't do, callously and without remorse, every single day.
Don't beat yourself up about it.
Don't punch the jerk-- even if his response was inappropriate and excessive.
What did you learn????
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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"