In what ways are the Netherlands socially liberal?
They allow people to use drugs and purchase sex - very enlightened.
Only the purchase of marijuana is allowed, 5 grams maximum. Heroin, cocain etc. are still forbidden. The Netherlands have a low number of drug addicts, lower or comparable to other European countries
Other examples:
Same sex marriages are legal. Gay couples have the same rights as straight couples.
Abortion is possible until 22 or 23 weeks. Women who go to abortion clinics are given a mandatory 5 days to think everything over, before they get the abortion. Abortion levels are very low, as are the teen pregnancy levels.
Euthanasia by doctors is legal (although in the Netherlands normally the word "gedogen" is used for it, it means that it is officially forbidden, but no prosecution follows when certain conditions are fulfilled). These conditions are that there has to be unbearable suffering (physically, not mentally), patients have an incurable illness and they gave their permission for the euthanasia, preferably before the suffering began. After euthanasia a commission of mostly doctors have to decide if all conditions were fulfilled, if not the doctor might be prosecuted for murder.
Maybe. But the muslim majority will never be there in the Netherlands. The birth rate in the muslim community is already decreasing, and the number of immigrations too.