Certainly one of the most common causes of murder and often stems from a feeling of inadequacy near women. Sometimes if a child has had a very domineering mother this comes out later in life in hatred and violence towards women. Men like Albert De Salvo and Peter Sutcliffe were both men who in normal circumstances seemed ordinary people but when alone with women changed into some kind of monsters determined to cause suffering and death.
People who commit sex murders put themselves outside of all that is considered decent by normal people. When convicted and sent to prison they usually end up being segregated from the majority of the prison population. In British prisons they can volunteer for Rule 43 which is a condition used to protect them from other inmates or sometimes to protect other inmates from them. The only inmates they are able to associate with are those who are also on Rule 43.
There have been many occasions when sex murderers have been harmed and
even killed by other inmates. Albert De Salvo who was the Boston Stangler
was stabbed to death and Peter Sutcliffe, the Yorkshire Ripper was slashed
across the face.