If we are to interpret explainer text meant to inform the public as word of law such as you have:

The civil harassment laws say “harassment” is:

• Unlawful violence, like assault or battery or stalking, OR
• A credible threat of violence, AND
• The violence or threats seriously scare, annoy, or harass someone and there is no valid reason for it.

Would mean that this is a credible threat of violence that is seriously annoying/scaring the individual, as they specifically mention how brave it is for trans people to show themselves in public, which can credibly be interpreted as a threat when the topic was never initiated by the victim.