The Geneva Conventions comprise rules that apply in times of armed conflict and seek to protect people who are not or are no longer taking part in hostilities, for example:

wounded or sick fighters
prisoners of war
civilians
medical and religious personnel

The United States Ratified these some time ago along with a bunch of other nations.

No where in the Conventions does it say" ...but if your enemy doesnt abide by the Coventions then you don't have to eaither"

Grave breaches of the Third and Fourth Geneva Conventions include the following acts if committed against a person protected by the convention:

willful killing, torture or inhuman treatment, including biological experiments
willfully causing great suffering or serious injury to body or health
compelling one to serve in the forces of a hostile power
willfully depriving one of the right to a fair trial.Also considered grave breaches of the Fourth Geneva Convention are the following:

taking of hostages
extensive destruction and appropriation of property not justified by military necessity and carried out unlawfully and wantonly
unlawful deportation, transfer, or confinement.

Further, those provisions are considered customary international law, allowing war crimes prosecution even over groups that have not formally accepted the terms of the Geneva Conventions.

I am ashamed to see our beloved country fall so low as to use such dishonorable methods and even try to validate there use, especially when all it does is to garner more opposition against our cuase!