Ist von denen I think but I’m not sure
If they heard about it afterwards, was couldn't be the answer.
Were not does not even make sense.
Will not means that this is in the future, and the crime has already occured.
Was not fits this answer best.
You can talk about how environmentally they are in germany (different trash cans and common use of bicycles), the Autobahn and U-Bahn (metro) system, and the different holidays they celebrate to name a few differences
