If only it were 15 yrs, more like 6 or 7 after time off for good behaviour and everything else they get to commute their sentences.
Had this been a British person committing the same crime in a Muslim country, I don't think the Death penalty would have been spared. As Steve W said, they don't have to come and live here, and if this country is so bad, they are welcome to leave and go back to a country with no welfare state, where there is no freedom of speach, no automatic right to justice and a fair trial and Islamic/Sharia Law will see them stoned to death for the smallest breach of law.