And he didn't even get his facts right. His atrocities were minor at best. Much of the killing had happened long before his time.
A government does not gain from showing its society a proper mirror. It runs the risk of losing ground by having "insulted" the guilty older generation and national identity, and simultaneously plants the distrust for itself (it mostly is that older generation) to form a youth revolt (the RAF supposedly formed from this distrust in West Germany.)