Toxic is contextual to an individual. Some products don't affect all life forms the same way, or at the same dose. Same for communities: you know if you are in a toxic one if you can objectively observe it brings unacceptable suffering to you when you are in it.
It's not precise science, it's subjective, and sometimes hard to identify.
Plenty of people prefer to be victims in group than alone though. We are weird creatures.