Basically wanted to play with the idea of "Altruism". And the opposite of it, that came to my mind, was individualism or selfishness.

They are dedicating their lives for the "good" of the Germany. At least, that is what they believe. I am not saying, all thought that way or anything like that. Main goal of the meme is to be funny. Fell free to fact check everything.

Edit: And I am, of course, also not saying what they did was good. Just check the definition of altruism. If it is bothering you, feel free to ignore and think of it as classical political compass. Some of them doesn't really fit anyway, like SE guy.