King Diamond sometimes seem to go into a spiritual side of things that is outside of what CoS stands for. I've seen other references to interviews with him where he talks about supernatural experiences which also seems to clash with CoS. So I would not be that surprised if he expressed views that were his own and not those of CoS, after all I don't believe that he is an official spokesperson?
On the other hand he could have been misrepresented or misunderstood by the person interviewing him, especially if that person has not done any homework on what CoS is about, or is looking for something sensational that would discredit Church of Satan
What we have as basis for any discussion here is your summation of what another person, of which we know nothing, wrote after talking with King Diamond. We don't know which issue of this magazine the interview is from, what the general credibility of the magazine is or who the interviewer was and how serious and credible he (or she) is.
Based on that I find it hard to draw any conclusions about King Diamond. But the statements themselves are easy to draw conclusions about, I don't even have to reach for my Satanic Bible for that.
When confronted with statements like this, it is good to remember what Carl Sagan pointed out - extraordinary claims require extraordinary proof.
This is an extraordinary claim, so it requires to have come from an credible, official source to have any weight. I think you can see the problem here?