Well i think that stems from a indoctrinated hatred towards the captives. If you think rationally (albeit coldly/mechanically) you'd figure out that torture isn't that effective. In fact torture just makes the captives hate you more. So that makes your job even harder.

But if you could shake their beliefs... Show them the error of their ways. And they actually might help you stop the other terrorists.

But all that needs that you actually see the captives as human beings.