Greetings from Freiburg. Important correction: The market around the Münster is mainly a farmer's market and takes place every weekday. The Christmas market is located around the town hall and NO part of it is on the Münster square.
you‘re right, Freiburg is one of the most criminal cities in Baden-Wuerttemberg, and it is absolutely not funny to go by car there, but there are these in this lovely video shown nice places and a lot more of them. Because of this, Freiburg is absolutely worth to be visited.
Ich bin hier schon einem Jahr und ich hatte gar kein Problem mit diesen Typer, es gibt ganz bestimmt gefahrlichen Teile der Stadt aber das ist immer in alle Städte