Irrespective of the moral/ethical rights and wrongs of this trade, in Holland such trade has been reported as potentially being in breach of Dutch criminal law 137e and if this view is tested in court and proved to be illegal then trade in such artifacts must stop in accordance with prevailing Dutch law. But it does need to be tested in court to clear up the matter.

The antisemitic bias to the original article post is quite clear as the author deliberately omits mentioning that 10 other Dutch veteran, resistance and other organisations such as the International Dachau Committee in Brussels also think this trade is unacceptable and should be stopped.