In fact it is useful and should be the occasion to once for all set the standard, I was expecting that.... didn't happen yet but never know it may come.
I'd say that, the terrible events of WW2 must not be used in today's political debate heated or not to score political points, it is shameful and wrong. It should be kept when it is appropriate, should a party or individuals to claim they are inspired by known crimes and are willing to repeat.