OK...I strongly disagree with not responding when you feel you are being disrespected.

Behavior Modification Technique 101 - The broken record technique

CHL: I will not respond to that question because it sounded like a jab. Please ask in a respectful way.

CHL: I will not respond to that comment because it sounded like an insult. Please tell me what you want to say in a respectful way and then I will respond.

This would be doing something different. Not responding at all just looks like conflict avoidance on your part. That makes Pam feel disrespected and triggers her. If you follow my suggestion, you are stating the truth in a way that is respectful to both of you.