Actually yes we should be makir tov to everyone who saves jewish lives. I am sorry that seems like such a difficult concept to you. Al achas kama vkama if that person is actually Jewish.
You are creating a straw man here. If a french soldier was actively saving a Jew in a shver matzav of course I would have hakaras hatov for him. For example, lets say we have a French soldier who saved Jews in the holocaust would you go ranting about how its all the French’s fault for getting themselves there in the first place and that we don’t owe him hakaras hatov ?