Why would Jews not be allowed to fly the German flag

Answer:An historical anecdote tells of a Jew named Isaac, who was part of a diplomatic delegation on behalf of the Emperor Charlemagne to the Abbasid Caliph Haroun al-Rashid. Historians believe that Isaac was added to the delegation due to the great influence of Jews in the Abbasid court. The Abbasid Caliph, for his part, sent the Charlemagne an unusual gift: an elephant named "Abu Abbas."

Explanation:A decree by the Roman Emperor Constantine the Great in 321 CE is the first mention of a tiny Jewish settlement in the city of Koln and other cities along the Rhine - Mainz, Worms and Speyer.

According to the decree, in these places, later to become known as "The lands of Ashkenaz", Jews enjoyed certain civil rights, but were prohibited from spreading their faith and their share in government employment was limited.

Until the Crusades, which began in the late 11th century, Jews coexisted peacefully with the local population and were allowed to hold property and engage in all trades and occupations.

An historical anecdote tells of a Jew named Isaac, who was part of a diplomatic delegation on behalf of the Emperor Charlemagne to the Abbasid Caliph Haroun al-Rashid. Historians believe that Isaac was added to the delegation due to the great influence of Jews in the Abbasid court. The Abbasid Caliph, for his part, sent the Charlemagne an unusual gift: an elephant named "Abu Abbas."

Due to the fact that the Germans killed millions of Jews, basically it would be pretty messed up and disrespectful to their nationality if they did. This is also what caused majority of the Holocaust.