Interesting ditty, obviously starting in the USA as a parody of the patriotic anthem "My country, 'tis of thee". The most logical verse would be "My country's mean to me, I'll go to Germany!" The frustrated narrator either hopes to be treated better in any other country, even in Germany, or he is a soldier and wants to become a war hero and thus earn his country's respect. With attitudes towards Germany constantly changing, such folk ditties inevitably become corrupted.