From a left-wing perspective, it does not make sense to create blackouts in residential districts (unless they were very well off ...
Creating blackouts or any other form of violence never 'makes sense' in residential districts.
And what does 'left-wing' and 'right-wing' even mean, at least in the extreme forms? What difference does it make when violence rules? Violence, imho, doesn't make sense. It may take some time until we eventually know for sure who is responsible, maybe indeed some weirdos hired by malign foreign states.
But as you mention the 'left-wing perspective:' Here on Lemmy is a larger group that calls itself left-wing, but in their communities they literally hail aggression and cheering violence against people, including violence against Ukraine by Russian invaders. Just read their comms.
As we know from other posts, there has been a study last year about this.
This study investigates the presence of left-wing extremism on the Lemmygrad. ml instance of the decentralized social media platform Lemmy, from its launch in 2019 up to a month after the bans of the subreddits r/GenZedong and r/GenZhou ... Their [Lemmygrad users'] support can extend beyond backing these authoritarian regimes [particularly Russia, China, and North Korea], even cheering on their violent actions, as evidenced by their posts on the Russian invasion of Ukraine. Additionally, we observe anti-Zionist and antisemitic behaviors, which show similarities to right-wing extremism ... Our analysis suggests a concerning endorsement of authoritarian actions and extremist rhetoric on Lemmygrad. ml, further indicating that left-wing extremist communities on decentralized platforms should receive more attention from the academic community.
[Edit typo.]