The appeal to the Right to Belief is NOT at at issue here, namely Freedom of Religion, which is always trumped by other Human Rights, the ones that guarantee many things such as the Right to Family Life and Freedom of Conscience.
What is at issue are the Practices, and Policies , based upon mere belief, that the J.W org. enacts, that run counter to those other Human Rights. Hence most civilised Countries ban by Law FGM for example.
What the J.W org. actually DOES, which deny basic Human Rights, is what is being challenged, and rightly so, and would be upheld by the ECHR, I hope, and am reasonably confident of.