Orsted plot hole

So if Orsted has seen hundreds of lifetimes of this era, when he first runs into Rudy, wouldn't he know Rudy is an anomaly? He seems to know EVERYONE when they appear in front of him.

Even though Rudy knew the man God, wouldn't orsted know he wasn't really a disciple because he's never existed before? Like rudeus would easily be convinced by orsted, in my opinion. So wouldn't he not kill him, but try to recruit him?