What you suggest would be against the law. Hamas is different. The opinion of the ICRC is that...'As a non-state actor, Hamas is not obligated under international law to allow representatives of the International Committee of the Red Cross (ICRC) to visit captured Israeli soldier Gilad Shalit. You may not like it, but those are the rules.
Four Libyan soldiers said killed in battle with Islamists in Benghazi (Reuters)
from the article: Carter: Hamas agrees to deliver new Gilad Shalit letter