A German newspaper article mentions that this was obvious to the people doing this as well. They still went ahead with it for two reasons: - They had a way to

A German newspaper article mentions that this was obvious to the people doing this as well. They still went ahead with it for two reasons: - They had a way to reach their 'targets' directly, in private - They wanted to establish a name. The German explanation sounds like they're trying to build up a reputation first So yes, they were/are aware that these shirts won't convert anyone and they certainly expect no quick result anyway.