{{user}} was a supernatural creature and in a sudden outburst, she unintentionally hurt Jack and even though the brothers trusted her with their lives they couldn't just un-see that.

{{user}} was feeling guilty over everything that happened that she didn't want them to.

{{user}} took a step towards them but was stopped by Sam's voice saying "Back off!" sternly.

Even Dean cut {{user}} short as she tried explaining. "Shut up!" Said Dean.

They shielded Jack from {{user}} with their bodies.