I didn't state what law was broken. I merely sited the motive.Actually, it is domestic violence. Sharia law had nothing to do with the case or the sentence. The sentence was in line with the sentencing guidelines applicable in Britain. Not rocket science, and nothing to do with the religion of the participants.
Sure, her family are bigots. But it's not yet illegal to be a bigot in the UK. I suspect, eventually, it will be. But the OP claims Sharia.... it isn't.
If it was illegal to be a bigot almost everyone would be in prison. However the level of bigotry is greater in this case. Threatening death just because you hate people of other religions or races is a bit extreme.
Reminds me of some cracker at TRANE where I used to work. Gossup gets around I'm married to an African-American and he states openly he would rather kill his kids then allow them to date or marry Blacks. I see no difference in that case and this one.