Yeah, Rudy is indeed associated with the Man-God. That's not a big leap of logic - Rudy mentions he's seen him.
The leap is where he assumes that Rudy is the Man-God's Apostle.
Apostle means follower, and generally worships a god or figure voluntarily. The involuntary ones are better known as slaves.
Orsted jumps the gun here by assuming Rudy's knowledge of the Man God means he's an Apostle.
I'm not particularly fussed about Orsted's reasons for killing Man-God worshippers or rescuing people he previously thought should die. I'm fussed about his jumping to conclusions.
That's just dumb.
Like... Eris-dumb.
Maybe worse.