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... he holds such very strong views himself, and because I believe that (maybe sincerely and without realising it) he needs you to fall in with his way of thinking
The judge does not go into detail about what the father's 'strong views' are, but if they have anything to do with weird religious cults or conspiracy theories then the Scandi child protection authorities might very well have made his life hell.
A recent letter from a High Court judge to explain his decision.
http://www.bailii.org/ew/cases/EWFC/HCJ/2017/48.html
Truly fascinating, and worth a read.