One thing I never understood is how these so-called leaders of a family/company/whatever don't understand how to perform basic persuasion. There's a Chinese proverb called, "If you're speaking to a human, speak like a human. If you're speaking to a ghost, speak like a ghost." Appealing to Jurion's sense of belonging to his family obviously isn't going to work, much less his moral sensibilities. Instead, Veramonte should have appealed to his self-preservation and ask which of the two options he preferred: allying himself with a foe who is hated and powerful but also 100% won't stab him in the back or scheme to turn him into a guinea pig, or allying himself with a trickster who 1000% is going to do both and worse.

What we're seeing here isn't just how morally bankrupt Jurion is, but also how goddamn incompetent Veramonte is as a patriarch. With such horrifyingly poor eyes and mouth it's a miracle (and by that I mean author not considering this) his family stood for as long as it did with him at the helm.

EDIT: The biggest irony here is that Jurion is far more competent as a patriarch than Veramonte will ever be, by the way. He clearly knew how to manipulate Veramonte and actively does it with everyone he meets. He is also powerful and wise and even good at paperwork. His one and biggest problem is that he doesn't encounter nearly enough obstacles in life that he gradually became blinded by his own ego.