That means “unconventional” thinkers. Or mavericks. Or contrarians, if you prefer.
These include, for instance, the 20,000 protestors in Leipzig who refuse to accept the German government’s Corona party line and are energetically expressing their growing dissatisfaction with the latest lockdown “light.”
“Corona party” (Corona party line) has a nice ring to it, don’t you think?
Nach dem „Querdenker“-Chaos brannten Barrikaden.