A person years ago made a comment to me, about witnesses. They said that in their opinion, being a witness brought out the extreme in a person.
For example, if they were untrusting, they would trust less.
If they were vindictive by nature, they would become more hateful and vindictive.
If they were kind and loving, they would even be more so.
Basically, whatever type of person they were, being a witness would intensify that persona.
Have you found that to be true? To yourself, to others around you? Maybe you knew someone before they came a witness. Did they become more extreme in their viewpoints?