"What did get established is that Charter rights extend outside Canada, and that repatriation is not a Charter right."

Omar Khadr was outside of  Canada, but the Government of Canada resides in Canada.  The Government of Canada participated in the United States Government's treament of Omar Khadr in contravention of the Canadian Charter Rights and international treaties, which the Canadian Government is a signatory to.

Frankly, whatever argument you are trying advance it appears you are scrapping the bottom of the barrel with the hope of creating an alternate reality.