Maybe I've missed it, but I haven't seen any way to define which entities should villagers run away from, specially in heavily modded environments. Guards' targets can be configured, but not potential threats for villagers to be aware of.

It would be as simple as adding a config entry table for it.

I might consider doing it myself and publishing a PR if you like my idea.

Notice for me: would require a custom sensor net.minecraft.entity.ai.brain.sensor.VillagerHostilesSensor