It's more about the idea in general. This world is made of witches and witch hunters. There are no good or bad witches. Just the fact that they use magic requires their immediate disposal. 

And that tavern thing. Even if it was a good witch.
It's like a rat exterminator having a pet white rat in home. Absurd!

And about the forest. Just think how many messed up abnormalities happen and live in that forest. It would be better for all if they just put an end to it, along with the horror spawns living in it. Not like anyone goes hunting or goes fruit picking on it anyway.