What happens when your fun-loving grandfather — a good husband, an upright citizen — turns out to have been a Nazi?

Since millions of NSDAP membership cards have been made available online, many Germans have been surprised to discover that their ancestors weren't always as innocent as family stories had led them to believe.

This story was reported by Deutsche Welle: DW.com - Culture & Lifestyle. EUROPES curates Europe's most relevant coverage — read the full report at the original source.