Here are direct quotes from those involved:

" 'Death was the least she deserved,' said Abdel-Qader. 'I don't regret it. I had the support of all my friends who are fathers, like me, and know what she did was unacceptable to any Muslim that honours his religion,' he said."

&

" 'I have only two boys from now on. That girl was a mistake in my life. I know God is blessing me for what I did,'"

&
" 'They will have the same end [as Rand] if they become contaminated with any gay relationship. These crimes deserve death - death in the name of God,' he said."

& from the murdered mother:
"'But they have sent a message saying that I am wrong for defending Rand and that I should go back home and live like a blessed Muslim woman,' said Leila,"

& from a survivor of the shooting:
'I could hear people talking on the corridors and the only thing that they had to say was that Leila was wrong for defending her daughter's mistakes and that her death was God's punishment.

These people think this has EVERYTHING to do with religion.

You and I know that this is not mentioned in the Qu'ran or hadith BUT they have been interpreted by some Muslims as religiously permissible from their readings. In a way you are right, it is cultural, but they get this culture from THEIR interpretation of Islam. They are linked and it is up to Muslims to sever this link.

Peace

"Deaths in the Bible. God - 2,270,365
not including the victims of Noah's flood, Sodom and Gomorrah, or the
many plagues, famines, fiery serpents, etc because no specific numbers
were given. Satan - 10."