pantominevlogs2016 old yt

While watching the movie (Suspiria 2018), I thought I understood where the story was going, but it just got more confusing. Most of them were "dead", but then, they were "alive" again, as if nothing happened? I know the movie was about a "cult", but I still did not quite understand what exactly was the cult about? At first, I thought they were killing their students one by one as an "offering" to the "black thing with long nails" so that they can continuously run the old ballet school in spite of their ages; immortality. But the ending was not anything like that. Lol. It got so confusing. Everyone was naked and dead without a clear ending.