Why is moral relativism the ultimate blow to theists?
Why do they quiver and shake, become so indignantly frightened at the thought that perhaps their dearly held objective morality -their quaint societal foundation- can so easily be removed?
This would throw their world into a dizzy shock. They have governed themselves by an abolute deistic law justified time and again by some unsubstantaited but firmly held belief that the words printed in their book - whether the Bible, Koran, Torah - were scripted by the very hand of their creator. And now, when this is stripped away, what is left but the very power that was employed to be sure that they abide by these laws - fear?
What is left now, in this hollow subjectivity? How are they to be governed?
No - how are they to be controlled?
Objective morality is the ultimate convenience. Not only does it provide you with a script for your actions, but it allows you to believe that what you are mindlessly following makes you better than others that reject it. It tempts you, seduces you, into slavery.