Looks more like someone just lost their collection of stuff to confiscatory officials. It'd be like me 'finding' money in your safe.
It the mentioned items have the provenance and associations that the ones mentioned in the article were claimed to have, they are likely worth quite a bit on the collector's market.
Among the finds, taken from a collector's home by Argentine officials and Interpol, are a large statue of the Nazi Eagle above a swastika, a Nazi hourglass, and a box of harmonicas, thought to be aimed towards Nazi youth.
I'm not sure what excuse was used to seize the hoard. The article doesn't say and misleadingly treats this like it had been found in a hole in the ground or a cave.
I don't agree with the actions or philosophies of the Nazis, but the destruction of things which are historical artifacts, or the seizure of such items in private hands is something I cannot agree with either.
Of course those items were in proximity to ranking Nazis, if the provenance claimed is provable (duh).
"Finding" the hoard in a collector's home proves the collector collected Nazi memorabilia, nothing more.