lennie chapter 5

in chapter five Lennie's behaviour changes. he goes from being the big soft man we knew to a violent aggressive man. this may be because he felt threatened by curleys wife as she threatened to tell on him. this may of brought out his bad side as we are shown in chapter five. his actions shocked me and resulted in death.  his childish behaviour shows us that he didn't know what he was doing and curleys wife be of been the one to blame. was Lennie the victim?