They're protecting Frois because he (at least in this story) is more focused on sharing his religion than acquiring power. I don't know historically if it's the same, tho
No it is. They didn't colonialize Japan and Nobunaga liked them because he found them humble and thought that they were different from the corrupted priests of the Japanese temples.
Doesn't mean colonialism never happened but missionary work was usually well perceived in the world.
Connection with missionaries means connection with the West & therefore access to foreign tech, workers, exotic ingredients & animals.
why are they protecting the missionaries.... what is the goal in the long run for protecting colonialism.....