In The Owl House, why does Belos choose to destroy the Boiling Isles?

In The Owl House, Emperor Belos wants to kill all the witches and destroy the Boiling Isles. My question: why?

Of course, if you have watched the show, you already know it's because he is a Puritan Witch-Hunter. My question is why does he choose that specific option? Especially for being from the 17th century, there are alternate things he could have done that would benefit him:

• Try to "save" the witches with colonial Christianity. Back then, they would do the same to Native Americans. Despite being a Puritan, he does not bother trying to convert anyone.

• Use his empire to his financial benefit. His takeover took centuries before the Bliling Isles became united, so why waste all that hard work? He could have had a slave empire, enslaving witches, having plantations, bringing in valuable materials, building a magic army to take over valuable lands and territories, etc. Instead, he chose to just destroy it all. Like Negan from TWD says, "people are a resource".

In the end, for all that Belos has done, why does he just simply want to destroy everything, rather than try to benefit himself or his faith?

I cannot remember the exact episode numbers, but during mid season 2 and early season 3 Belos repeatedly mentions that he had a brother who was "seduced" or corrupted in some way by a female witch (whom is it implied, though never confirmed, to be Eda).

His reason for wanting to destroy all witches is that he blames all of witch kind for what happened to his brother.

The reason that he doesn't want to convert them is likely for real world reasons. Disney traditionally avoids references to European based religions in its cartoons. There are a few exceptions, but its the rule more often than not. For example, Christmas\Easter episodes typically only mention Santa and the Easter Bunny.

Real world history aside, in Owl House canon it's never actually been confirmed that Belos was religious, he's never seen in association with any religious symbols or performing any kind of religious acts, and non of his dialog references religion or wanting to hunt witches for religious reasons.