Dr Mackereth's claim was based on a mix of religion and other beliefs as well as scientific facts.
6. He further relies [ET1/5], cumulatively or alternatively, on the following religious and/or philosophical beliefs:
a. “His belief in the truth of the Bible, and in particular, the truth of Genesis 1:27: “So God created man in His own image; in the image of God He created him; male and female He created them.” It follows that every person is created by God as either male or female. A person cannot change their sex/gender at will. Any attempt at, or pretence of, doing so, is pointless, self-destructive, and sinful.(“Belief in Genesis 1:27”)
b. Lack of belief (i) that it is possible for a person to change their sex/gender, (ii) that impersonating the opposite sex may be beneficial for an individual’s welfare, and/or (iii) that the society should accommodate and/or encourage anyone’s impersonation of the opposite sex (“lack of belief in Transgenderism”)
c. Belief that it would be irresponsible and dishonest for e.g. a health professional to accommodate and/or encourage a patient’s impersonation of the opposite sex (“conscientious objection to Transgenderism”)”
...
41. In his witness statement Dr Mackereth refers to “Transgenderism” and “gender fluidity” as having no sound medical or scientific basis [DM/28] and refers to “Transgenderism” as a “delusional” belief” [DM/30].
I think it may have been unwise for him to describe transgenderism as delusional, because this is used against him in the judgement.
195. We thus turn to the Grainger criteria. We accept that the belief in Genesis 1:27, lack of belief in transgenderism and conscientious objection to transgenderism [ET1/5a-c] are genuinely held and that the belief in Genesis 1:27 and the first aspect (b)(i) of lack of belief in transgenderism are beliefs that relate to a weighty and substantial aspect of human life and behaviour and attain a certain level of cogency, seriousness, cohesion and importance. We say that because given the low threshold we find that (b)(i) may follow from (a).
I think they're comparing a belief in Genesis 1:27 to a 'belief' that humans cannot change sex.
196. As to (b)(ii) notwithstanding the low threshold, we find that the lack of belief impersonating the opposite sex may be beneficial for an individual’s welfare, and/or (b)(iii) that the society should accommodate and/or encourage anyone’s impersonation of the opposite sex are opinions or viewpoints predicated on the assertion that Transgenderism in Dr Mackereth’s words is a “delusional belief[s]” by reference to the use of the word “impersonation” [DM/30] and do not relate to a weighty and substantial aspect of human life and behaviour or attain a certain level of cogency, seriousness, cohesion and importance because of the narrowness of the issue they represent.
I'm having difficulty making sense of this. I think it's saying that his use of the words "delusional" and "impersonation" imply that this is not an important part of his life. If they consider that these "do not relate to a weighty and substantial aspect of human life and behaviour" for the hypothetical trans person, I don't think they'd have ruled against Dr Mackereth.
197. Irrespective of our determinations above, all three heads, belief in Genesis 1:27, lack of belief in transgenderism and conscientious objection to transgenderism in our judgment are incompatible with human dignity and conflict with the fundamental rights of others, specifically here, transgender individuals.
I'm sure Christians will be interested that the court views belief in Genesis 1:27 is incompatible with human dignity and conflicts with the fundamental rights of others.