Is hunting with iron traps that torture the deer and break its bones permissible, and what is the ruling on buying meat from a hunter who uses this method?

Hunting with traps and similar methods is not forbidden. It is permissible by any means, such as traps and nets. It is also not forbidden to buy from someone who hunts using methods that involve torture, because there is no direct or intended assistance to the forbidden act. What is forbidden is the torture itself, not buying from someone who commits it.