I am a practising Catholic. To me, blasphemy laws are appalling and anti-Christian because they are inherently divisive. Even within a religious context they are stultifying. You cannot deepen an understanding of some aspect of your faith without questioning what it means, and if doing do appears blasphemous to someone else, you can find yourself on the wrong side of the law. It has happened time and again since any sort of religion came about, and keeps resurfacing.

But that is only within the religion. To that you need to add the argumenrts for separating state and religion. And then you need consider people of other religions and none.

Blasphemy laws are inherently about limiting how people think. I can't think of many worse ideas than that.