"the power is out and I know why" implies advance knowledge of the attack at the least, and most likely their involvement in planning/coordination. why else would she know?
Also, we shouldn't mince words here, this is a terrorist attack on civilian infrastructure for political ends. If this had been done by islamists, we'd call it as such. Instead we play the "gosh well she technically didn't say she did it" and "gosh how can we tell what the motivations might be" games... like, we have a group openly claiming responsibility for the attack here and people want to play the "how can we really know anything?" crap. C'mon.
Yeah it does imply that, but that is not the same as a confirmation that they, or someone in their group, are behind the attack. It is a motive, but there is no smoking gun. And it seems that the police have been in contact with the person and saw no reason to arrest them, but they did not expand of why they did not, which I think is a separate issue.
Hopefully they will be able to find the people behind this attack though. And if it turns out to be the person above I hope they will be stuck down with both terror and hate crime.
Additionally, this literally just happened, so for all we know police are just erring on the side of caution by holding maximum cards to their chests while "what the fuck even happened" is still being resolved.
That being said, I also wouldn't give too much faith to the police. Police as an institution have been historically LGBTQ-unfriendly, and have perpetrated anti-LGBTQ violence on an institutional level in the past.
Also, we shouldn't mince words here, this is a terrorist attack on civilian infrastructure for political ends. If this had been done by islamists, we'd call it as such. Instead we play the "gosh well she technically didn't say she did it" and "gosh how can we tell what the motivations might be" games... like, we have a group openly claiming responsibility for the attack here and people want to play the "how can we really know anything?" crap. C'mon.