The religion of Islam is based on free will - there is no compulsion in practicing ones religion. Does it mean that we leave everybody to do what they want to do?! Absolutely not!
For example, the following ruling is for drinking:
[5:90] O you who believe, intoxicants, and gambling, and the altars of idols, and the games of chance are abominations of the devil; you shall avoid them, that you may succeed.
Now, if a citizen disobey the above law, God will take care of him for his disobedience.
But, how do you protect your citizen from a drunk driver?! The citizen will decide their affair after due consultation. They may vote and pass a law to penalize the drunk driver. They may vote and pass any law for the benefit of their society. If they think that drinking creates social problem, they can ban it altogether after due consultation.
[42:38] They respond to their Lord by observing the Contact Prayers (Salat). Their affairs are decided after due consultation among themselves, and from our provisions to them they give (to charity).
Please note that the verse 42:38 above does not promote compulsion either. There should be always check and balance. It is not upto Sweden's Muslim Minister to make decision on hijab. It is upto her citizens to make decision after due consultation.
Please note that God Almighty did not use the word "hijab" in the Quran as dress code. According to the Quran, the dress code is the righteous dress. In the Swedish environment, the so call "hijab" may not be a righteous dress if it draws attention to other people in the street.
[3:104] Let there be a community of you who invite to what is good, advocate righteousness, and forbid evil. These are the winners.
Thank you and may God guide us,
[33:62] God's Sunnah is unchangeable [39:23] The Quran is the best Hadith http://www.masjidtucson.org/quran/