Bible Not Violent Except For The Violent Bit's

Britain’s hard pressed immigration department has the difficult decisions of whether someone is a genuine asylum seeker and they have various ways of picking out false claims as they demonstrated with one Iranian national who as part of his claim said he had converted to Christianity because it was a 'peaceful religion'.
The Home Office were not fooled though, replying that Christianity was hardly peaceful and used verses from the books of Leviticus, Exodus and Revelation to dismiss his case and refuse his application.     
As expected the Church of England denounced the decision that their religion wasn't one of peace, spluttering that they were 'extremely concerned on such a profound misunderstanding of the texts and practises of faith communities'.
I am assuming that the bit where it says: 'If a man has sexual relations with a man as one does with a woman, both of them have done what is detestable. They are to be put to death; their blood will be on their own heads' is one part that has been misunderstood because 'put them to death' can be taken any number of non-murderous ways.
So if that part of the Bible has been misunderstood then i suppose that also goes for the bits that say others who should also be put to death include People Who Don't Listen to Priests' (Deuteronomy 17:12), Witches (Exodus 22:17), Fortunetellers (Leviticus 20:27), anyone who hits their parents (Exodus 21:15), anyone who curses their parents (Leviticus 20:9), adulterers (Leviticus 20:10), anyone who follows another religion (Exodus 22:19), non-believers (2 Chronicles 15:12-13), Women Who Are Not Virgins On Their Wedding Night (Deuteronomy 22:20-21), Blasphemers (Leviticus 24:10-16), and Sunday workers (Exodus 31:12-15).
Honestly, how anyone can take the phrase 'put them to death' and interpret it as an act of violence is beyond me.