If one reads the Bible, there is no doubt that the Bible does not condone adultery; it is considered a sin. There is also no doubt that the Bible does not condone fornication, whether it is between individuals of same sex or between individuals of different sexes. There is also no doubt that the Bible does not condone sex between individuals of same sex. Lest, someone says Bible only prohibits, let me also state that the Bible considers marriage (and sex within marriage) as honourable.
Frequently we come across individuals who believe that because the Bible considers these mentioned activities as wrongdoing or sin, these activities must also be criminalised. Meaning, these activities must be banned by the state, which implies that whoever does such things must be caught and appropriate punishment be given (by the state). Is this thinking quite correct? Just because Christians believe certain action to be wrong or sinful, must that action be criminalised? When I eat pork, which the Muslim considers as sin, should I be handed over to the police? When I eat beef, which is anathema for Hindus, should I be handed over to the police? Not really! Well, the point is that we need to differentiate between sin and crime.
In a liberal democratic society, just because one religious community considers an action as sin, the state cannot just come in and take action against the sinner. If the society is an Islamic society, eating pork may be a sin as well as a crime. In such a society what is a crime or not may be defined according to the teaching of the Quran. However, in a liberal democratic society, no religious texts should really define what is a crime or not. There has to be something more. There may be an overlap between a sin and a crime. So raping someone may be a sin as well as a crime; so also may be stealing, killing etc., but not eating pork, eating beef etc. Eating pork or eating beef may be a sin for someone but they should not be criminalised. The state must determine what is a crime depending on the sentiment of one religious community while undermining the sentiment and the liberty of other religious communities. This is an important feature of a liberal democracy. Similarly, for fornication, adultery or homosexual act, just because the Bible is against such activities, we cannot ask the state to criminalise the acts. If we are to seek criminalisation of these activities, we have to be able to provide other reason beside appealing to the teaching of the Bible. If we don't do that, the Hindus will seek to criminalise beef consumption based on their belief; so will Muslims seek to criminalise pork consumption based on their belief. And when they do that, we would have no good reason to argue against their effort.
This kind of reasoning will be appreciated more easily by those who belong to the religious minority in a particular situation. A member of the religious majority may not appreciate this kind of reasoning because they know that they will never bear the brunt of such a policy. This is the reason why many members of the religious majority dislike liberal democracy.
In the past, many countries would write their laws reflecting the religious nature of the majority of the people. Things began to change in the 17th century. There are different reasons for that, which I am not going to get into now in this post. Now with people migrating back and forth, and therefore the religious composition of a state/country having become more diverse, being a Christian/Buddhist/Islamic country is becoming more problematic. We still see many Muslim majority states/countries having Sharia law in place. However, even with these states, the tension will get worse and worse, because as more and more people from these states travel abroad, they learn from others; plus, as more and more people from other countries come to their country, they find that there are many people who have a different way of living. Moreover, with social medias like Facebook and Youtube becoming so common, learning both bad and good things about others began to take place, and they influence our way of living. So today the question is whether these Muslim states will open up gradually and accept multiculturalism or they will close their doors because they found other cultures polluting their way of life.
In the biblical scheme of things, readers realise that though God's kingdom of earth is inaugurated through the dead and risen of Jesus Christ, the consummation of his kingdom is awaited. We are now living in between the tension where the kingdom is already come but not yet fully realised. In this period, people are given the choice to accept or reject Jesus Christ; it is the time when both the wheat and the weed grow together. Therefore, for the Christian to force people not to commit sin through state's legislation is not the right approach to call people to live a life of holiness. God gives choice; and we have no business threatening people with imprisonment if they live an adulterous life. I may persuade a friend or even a stranger not to live an adulterous life; however, it is a different matter if the state criminalises and sends an adulterer to jail. In similar vein, Hindus or Muslims persuading me not to eat pork or beef is okay; but it is a different matter if I were sent to jail for eating pork or beef. Spending much energy and money seeking a legislation that will criminalise activities that I consider as sin, which others don't, is not the way to do public theology for a Christian. The more appropriate approach is to share the message of Jesus Christ to a person who may be living a life that I consider as immoral, and when this persons accepts Jesus Christ as Lord and God, he or she will submit to the ways of Jesus Christ.
NB: While discussing about sexual behaviour, it is important to make a distinction between criminalisation and legalisation. To criminalise an act is to say that if an act is performed, the one performing the act will be imprisoned or treated as an offender in the eyes of the law. When one argues that an act should not be a criminal act, it does not mean the act is praiseworthy or honourable. So when one says that adultery should not be a criminal act, it does not mean that the state should praise or honour adultery. In similar vein, when one argues that homosexual act should not be criminalised, that does not necessarily mean that same sex marriage should be legally accepted. In the post, I argue that sexual behavior like fornication, adultery and homosexual act should not be criminalised; I am not saying that the state should honour these activities. In effect, I am not saying that same sex marriage should be legally accepted.