Terrorists are not covered by the Geneva Convention. You know that. It would not apply.
First of all, you aren’t making it clear to which Convention you are referring.
Secondly, they are...unless we declare the conflict as outside the Conventions.
Thirdly, we are...unless we declare the conflict as outside the Conventions.
Fourthly, IANAL, so this is not legal advice.
Oh, and there was no trial to determine these were terrorists. Do you want American troops to face Iraqi trial, if we aren’t considering them under the Geneva Conventions?