Yeah, it relies on a fundamentally faulty assumption that most people feel the same way they do or at least are adjacent enough to be open to their weird fantasy about instant ethnic violence arising from a brief disruption of normal operations. The 'silent majority is on our side but won't speak out' is a necessary pillar propping up their worldview, but doesn't survive contact with reality.

The reality is that people tend to get closer with their local communities during crisis. Especially if that crisis is 'neo nazi dipshits broke the power grid and now we have to go next door and see if they're okay or need to borrow some drinking water from us'. Even if they succesfully fucked up the power for a week it would be a net negative for them.