During WWI and WWII how did Germans feel about their "National Community?" Did the German people really believe in it or were they just more or less...

There is
simply no way to know the answer to this question.

First of all, we do not
have polling data that could tell us what the average German believed during either of these
wars.  It certainly looks as if they tended to believe strongly in their national community, but
people sometimes act outwardly in ways that do not correspond do their true beliefs.  Without
accurate polling, we can't know what they truly felt.

Second, it would
be...