Solingen: Deadly incendiary attack motivated to the extreme right?

Last year, a 39-year-old killed a family of four in an arson attack in Solingen. According to investigators, the act was unpolitical. However, the perpetrator had far-right Nazi propaganda material and set fire to the same house on November 9, 2022. How unpolitical can this act be? A year ago, on March 25, 2024, a 40-year-old was setting up a residence in Solingen... Source