and so it was important for me to tell other people. i hope it will help so that things like this will never happen again. reporter: germany has worked to ensure the horrors of world war ii are not forgotten. schools are required to visit holocaust memorials. but germany s culture of remembrance is being challenged by the afd, or alternative for germany, a nationalist far right party that is now the largest opposition party in parliament. afd lawmaker wolfgang did ondemand an end to the stumbling stones. he refused to talk to cnn but referred us to this statement instead. the stumbling stone initiators impose a culture of remembrance on their fellow human beings, dictating to them how they should remember, who, and when. who gives these obtrusive moralists the right to do so?