You have to understand the thinking of a religious fundamentalist, which all trans ideologists are. The private sinner can be forgiven. The public heretic must be burned.
Neil Gaiman might be an individual sexual abuser, but how many women can he victimise? JK Rowling not only condemns her own soul, but because she has public influence, she can hurt millions of men who believe they are women by influencing millions of people to reject the fantasy that men can be women. That's why heretics needed the highest possible punishment--they could lead millions astray with their heresies.