By the standards of our community, yes, you're never supposed to flee in tears, and Harry has right-of-way to express any ideas he wants.

In a public debate, yes, that is bad form.

But getting emotional, crying and running off does not necessarily merit penalty points in a human interaction, and certainly not for 12 year old girls who have recently been threatened with a lengthy term of prison/torture, and finds that her best friend and savior had a hidden and close relationship with someone who wanted to do horrible things to her. Violation of basic trust and in group solidarity.