IIRC Portugal wasn’t aware of the vast landmasses to the west and felt they got the better deal, Spain only getting a sliver of land and some grey areas on the map.
But big papa should have gone “I think it all belongs to the church and if you disagree, you go to hell.” Much like how the church got wealthy in the first place, “Put us in the will and your sins will be forgiven.”
I always wondered why there weren’t any nuke batteries available. We have had the technology for decades.