

No, according to the Geneva Conventions only armed combatants are legitimate targets. A militant Hamas member who is injured and in hospital is not a legitimate target.
A journalist, even if he was a Hamas member, is not a legitimate target.
A doctor, even if he worked for the Hamas run health ministry is not a legitimate target.
The captives returned by Hamas were in way better shape than the captives returned by the IDF. There is no report of Hamas raping or torturing captives, but there is extensive documentary evidence of the IDF raping and torturing captives.