However, as far as religious matters not being subjected to worldly questions, then why did they postpone the Holy Year during the time of the civil war? That certainly was worldly
It was apparently very worldly indeed and not a good precedent for today.
Like many others, I thought that the changes to the timing and duration of the Holy Year during the Spanish civil war were made because of concern for those who travel to Santiago in dangerous circumstances, i.e. danger to their health and their lives. I am not so certain of that any longer. A
quote from SER, the Spanish radio network:
At SER, we have spoken with Lourenzo Fernández Prieto, professor of contemporary history at University of Santiago de Compostela, who warns that the past is loaded with meaning and that you have to be careful with the references you choose.
In his opinion, the historical reference is not the most appropriate. “In 1937, the Holy Year was prolonged at the request of the caudillo [Franco] at a time when he commanded more political and military power than the Church, because 1937 was his first triumphal year, and 1938 his second year. I think that this reference by Feijoo [president of Galicia] to the Civil War is not going to please the Compostela Church at all“.
I had not been aware of this historical background at all. It's worth knowing, imho. You may also want to read for example
Politicization and Desacralization of the Cult of the Apostle Santiago in Spain (1936-1943).
In any case, it looks like the Holy Year 2021 will start as planned on 31 December 2020 with the opening of the Holy Door. And so far, the Compostela archbishop has refrained from making a move to have the Holy Year 2021 extended into 2022. For this to happen, he would have to make a formal petition to the Pope.