Are Honour Killings culturally and/or Religiously Motivated?

A mother accused of attempting to murder her young adult daughter in an "attempted honour killing" has been released on home detention bail, despite the (...........) Supreme Court hearing the alleged victim still fears her family and what they could do to her.
The 56-year-old woman — whose identity has been suppressed — has been charged with the attempted murder and false imprisonment of her daughter in November last year.
The victim's father, brother, sister and brother-in-law have also been charged with attempted murder, while the victim's other brother and brother-in-law have been accused of searching the victim's partner's house two days earlier.
The Supreme Court heard the victim's father allegedly stabbed his daughter with a knife at the (.....) Shopping Centre car park, (......), while her mother and other co-accused allegedly held the victim.
Prosecutor Tali Costi told the court the victim's mother then allegedly helped force her into a car, took her home "gravely injured" and put her in the bathroom without seeking medical assistance or contacting police.
"The evidence points to family members working together to communicate with one another to share information about where the complainant was in the lead-up to the stabbing and they're all present at the time this occurred," she told the court.
She also told the court the alleged victim's boyfriend had received "threats that he and the victim would be harmed" by her family two days prior to the incident.
The court has previously heard the young woman had an arranged marriage to her cousin.
Justice (..............) said the alleged victim had left the family home some days earlier "over a dispute over her relationship with a man" of a different religion. 

In today's modern civilised society, the behaviour of the accused parties is considered to be disgusting and abhorrent. Yet some cultures and religions fully condone honour killings.