The problem is that the Evangelical Lutheran Church is the established (state) church in Denmark.
The UK parliament could probably do the same to the Church of England. Non established churches in Denmark are not affected
Interesting quotes from the article:
“Fewer than 5% of church members attend services every week. However, the church is still widely used for traditional family ceremonies including christenings and confirmations. In the year 2008, 41% of weddings and 89% funerals were performed in the National Church,and 71% of adolescents in grade 7-8 were confirmed.
“According to a 2009 poll, 25 percent of Danes believe Jesus is the son of God, and 18 percent believe he is the saviour of the world.”