Purim was a month ago. Many of our zemirot tunes come from Polish and Russian folk songs and even drinking songs. Chabad even adopted one of Napoleon’s marches even though the Baal haTanya supported the Tsar.
However, Rav Meir Simcha tells us the real reason. Thinking that Berlin (or Brooklyn or Monsey or Lakewood) is our Jerusalem. Rav Kook says that there are three types of olim corresponding to the three types of shofarot. The best type comes from a ram – those Jews who make aliya out of a religious desire to build the land and keep its mitzvot. The second type are those who come for nationalistic reasons. This is not the best shofar but it comes from a kosher animal so one may make a beracha. The third type are those who are pushed out by antisemitism. This is the shofar from a non-kosher animal. It may be sounded if there is nothing else but one may not make a beracha.