If this German police officer if a Non-Muslim, I would like to invite him to Islam.
People can be transformed. The opponents of the Prophet (p) were particularly vicious against Muslims. Hind actually bit into the liver of the Prophet’s uncle, Hamzah, when he was martyred at the Battle of Uhud. However, she later became a Muslim, and hence became a Companion of the Prophet (p), a member of that special generation of humanity. In fact, she even narrated hadith which can be found in the well-known compilations. Repentance is a recourse that the Lord of the World’s has given humanity. [p129, Purification of the Heart by Hamza Yusuf]
“It was funny… (he) squealed like a pig”: Germany’s Muslim-intolerant police force – The Express Tribune Blog