Why Not Really Torture?

I’m also bothered and confused by the “the ends justify the means” defense of "enhanced interrogation techniques" being espoused by Bush Administration defenders. How did the Bush Administration decide where to draw the line of acceptable versus unacceptable techniques? If they were really worried about the safety of U.S. citizens and convinced that torture, excuse me, "enhanced interrogation techniques" were required, why weren't they willing to authorize techniques more severe than water boarding?

The line had been drawn for decades with the Geneva Conventions and U.S. law. The Bush Administration thought these rules were inadequate to the threat we faced. They decided they needed to move that line, but they only moved it a little.

I'm missing something.