It got named because the alleged attacker called the police and said "it was me, Kiwi Farms user so-and-so." The user in question denied making this call and claimed they had been impersonated. This happened in the midst of the pressure campaign on Cloudflare, to a GOP House member known for jumping the gun who had no prior history with Kiwi Farms. If that's not extremely suspect I don't know what is.