It's the tradition silly. They just want the good old days. They're just conservatives.
Why were there only 22 nazis on trial in Nuremberg? Because the dock could only fit 22 people. How did the denazification go? Of the 1.3million nazis to be prosecuted it was only a fraction of a fraction. Germany now is not what it used to be then, but there are 'conservatives' among the good German people.
Turrets can spin 360 degrees over and over again. There are many reasons to nave the turet backwards in regular situations. In repair situation it allows access to thr engine compartment. So if this was meant to be a "Polish" joke, the joke is OP.