I can see how is it disappointing. However you can also see how broad inclusion can be disappointing for "German Germans". You see, as an Israeli you have more

I can see how is it disappointing. However you can also see how broad inclusion can be disappointing for "German Germans". You see, as an Israeli you have more flexibility and perhaps specific community support and, being a minority, additional lobbying power. Whereas "German German", while being exactly same German as you (or your son), lacks all that and therefore at a disadvantage. They become "just Germans". These incentives lead to fragmentation of core German identity: everybody gains from declaring them as "German and Somebody Else". But fragmented society is a liability how we saw in Syria or Bosnia or many other troubled countries. Therefore, while "German Germans" and "non-German Germans" should be equal almost everywhere, the former should have distinct weight at shaping society culture and policy. It's just more natural that way. Disclaimer: I'm not a German but from a country that have similar issues.