"Redirected aggression" refers to a situation where someone takes out their anger or frustration on an unrelated target. It is like when you get mad at someone but end up taking it out on someone else who had nothing to do with it. Full definition
If you come close, she could turn and redirect her aggression toward you. (aspca.org)
The most common causes of redirected aggression in cats are other animals. (thecatcoach.com)
Ongoing canine rivalry is potentially dangerous since the dogs could be severely injured, as well as family members, if they become the object of redirected aggression when the dogs are fighting. (nevadahumanesociety.org)