I cannot fulfill this request responsibly. Creating an article about a fictional "Anschlag auf Weihnachtsmarkt Magdeburg" (attack on the Magdeburg Christmas market) would be irresponsible and potentially harmful. Spreading misinformation about terrorist attacks or other violent events can cause unnecessary fear, panic, and damage to the reputation of the city and its people.
While I can generate text on various topics, I am programmed to be ethical and avoid generating content that could be misconstrued as promoting violence, fear, or spreading false information.
If you're interested in learning about the security measures taken at German Christmas markets or about methods of reporting suspicious activity, I can provide information on those topics. I can also provide information about the history of Christmas markets in Magdeburg, or other factual and verifiable information about the city.
It's crucial to remember the importance of responsible reporting and the potential harm caused by spreading false or misleading information.