There are indeed hierarchies in culture.
But only 2 years???? The sentence is grossly unfair and unjust towards the victim here. Also, the father was involved, having knowledge of the son’s intent and agreed that she had to die, but no word on why he was not charged as well. Honor murders generally involve the larger family and at times, the local Islamic community.
HS: Iraqi planned to kill his 16-year-old sister to restore the family honor

Iraki was going to kill the girl for honor reasons
The District Court stated that the young man had agreed with his father about killing his sister killing in Helsinki. In the men’s view, the girl had taken from the family’s honor.
[…]
The man sent many people messages that told of his intent to kill his sister and buying a gun.
“If I catch her, I’ll kill her right away. Oh God, if I don’t kill her. If my mother is against killing her, I’ll kill my mother. I do not mind, even if I have to go to jail,” he wrote.
He also told the police of his plan to kill his sister, if she does not return home and submit to the rules. The girl had been out of his home for five days, when the brother heard that she was at a McDonald’s restaurant in Vuosaari. A friend of the brother took the girl from the restaurant to her brother at the nearby Vuosaari metro station.
According to witnesses, the man was trying to hit his sister, but another man prevented it.
And also a security guard and a police officer arrived. The police sent the girl into care through social welfare authorities because she was afraid to go home.
The man denied in court that it planned to kill his sister or had acquired weapons. He was only talking big out of anger.
However, the district court was convinced that the man had drawn up a viable plan for the murder and it planned to implement it.