Suppose you are captured by some really sick evil people in some god-forsaken part of the earth, and they want to mess with you head. They put you in front of 2 people and tell you that if you torture person A, then they will let person B go free and they will let you go free, but if you do not torture person A, then they will torture both person A and B and will keep you captive. Let's say the first few times they give you this choice with fresh people each time, you manage to keep your "moral" high ground and you refuse to torture person A. But every time you watch as they torture both people. Do you not think that it would be the correct choice at least one time, to torture person A in order to see if they really do let you and person B go, or if any kind of better outcome can be achieved than what keeps happening?
It's a ridiculous hypothetical, but if you are going to claim that it is a black-and-white issue and that torture is ALWAYS immoral, all I have to do is provide ONE counter-example where it would not be the case, in order to invalidate your claim.