strictly imo, but I disagree that the dark fanstasy of FfH world means good and evil are arbitrary labels. Rather it means that there are no easy choices, who to trust is not clear, even benign orgainizations may be filled with corruption, and the good guys are no more likely to win than tha bad.
But any commoner would much rather be in the Order lands than the veil lands once the armeggeddon starts. Some innocents are certainly judged too quickly, and no one is likely to ask "how are you feeling today?", but their goal is to protect those who can't protect themselves from the forces of Hell. They would be dangerous, insane fanatics, except for one thing--they are right about the danger their foes pose. Perhaps they go way too far--or perhaps they do exactly what they must.
Likewise, the Malakim may view your faith as dangerous sedition to their community, the dwarves may eye your gold pouch, the Elohim may be too busy looking after some shrines to lift a finger when you are attacked, and the elves may view you with a haughty disdain, but compared to living in the lands ruled by the Calabim, the Clan, or the other truely evil leaders, good & evil do have some true meaning.
I should say I don't mean good as in perfect, but on balance a net positive force.( I'm not looking ot sign up with any of these

)
(There is an alternative view that the calling the Order good is a joke and they are blood thirsty hypocrites, and some of the community-written pedia entries reflect this.)
Edit: I wouldn't call RoK greedy, but I would say there is little emphasis on personal discipline or charity, and they are prone to be apathetic to outsiders. So greed is a temptation they succomb to, a common weakness rather than a philosophy.