change hostility to friendliness.
quiet,satisfy, mollify,pacify
Placate means appease or pacify by acceding to demands or granting concessions; "the appeasing concessions to the Nazis at Munich."
The word that comes to mind is "scapegoat." An abuser will unjustly blame the victim (aka scapegoat)for anything. The victim will in turn try to placate the abuser, trying to smoothe things over....
To appease or pacify.