This refers to the unpleasant feeling a person has when there is a threat of harm to himself or others.
# upset
"distressed" or "troubled"
# to one camp and attacks it, then the camp that is left will escape
Here "camp" refers to the people. AT: "to attack the people in one camp, then the people in the other camp will escape" (See: [[rc://en/ta/man/translate/figs-metonymy]])