Torture is relative...like everything else.
Bad nations wear pants, should we not wear pants because of it?
Bad nations have armies, should we not have an army because of it?
Bad nations lock up people for theft, she we not lock up people for theft because of it?
All because bad nations may use torture, shouldn't keep us from using it. They use it to keep people in line, we use it to keep people alive. Motives are everything.