I want to clarify your position...
Suppose I leave Islam and then write a book detailing why I left Islam. Suppose this book is not crude or insulting, but does contain harsh condemnations of Islamic ideologies, outlining many reasons why the are damaging to the individuals and societies that hold them, and that also this book encourages people to reject Islam. Would you support or not support the killing of the author of this book?
I would not support that kind of murtad.
I force him into exile.
Trust me that is very civilized decision.
By forcing u into exile i actually saved your life!!!
If u were normal apostate minding his own business, but people know u left islam. I would defend your life and punish any person who harms u. In my kingdom u can worship in ur synagogue church or temple.
Some muslims would love to kill u. I believe Quran and hadiths(not fabricated hadiths) protects lives of normal apostates.
Let say you wrote book without insults and without encouraging others to leave islam, in that book u mention why u left islam and so on. Then i wont force u into exile. Its normal book. I would love to read that book and disagree with u.
But insulting or encouraging others is dangerous!