Yesterday I would argue this is unimaginable, someone being investigated for blasphemy in 2017 (in the west). We are dropping the ball on free speech. We chipping away on our liberties bit by bit. This is why hate speech laws are dangerous.
It's still pretty embarrassing that this sort of thing can happen. I hope the negative attention this will bring will force some progress on the matter.
Have a look at the film "The rocky road to Dublin", a documentary about life in Ireland in the 60's, made by an outsider. To see how bad things were until that recently (Its like Iran under the Shah or something)
In effect, the anonymous accuser is doing exactly what you, a freedom loving person, would want him to do: Call these laws out for their backwards and repressive themes.
You are mixing apples and oranges. Hate speech laws are perfectly fine, they intent to protect people from being harassed and attacked for what they are (philosophically, religiously, skin color...). This is not hate speech law: no group or people or people are involved here, only an imaginary character. If I say "death to religious people", this should be criminalized. If I say "death to god", there is nothing wrong with that.
I think the American standard is fine. You can say that, but you can't say "let's kill those religious people over there."
abortion is still illegal in nearly all circumstances, divorce was only legalised in 1997 and only in very specific circumstances
These comments were made during an interview on the Irish public broadcasting network; just for a comparison, in Italy nobody would have even dared to speak their mind so clearly about God on tv, or the show would have likely been cancelled. Twenty years ago the sitcom "Father Ted" became the most popular show in Ireland, and it would be still considered too blasphemous to be aired by any of the major tv networks in Italy.
And Hate Speech laws are not dangerous (and a different issue than blasphemy)