This person was apparently a Holocaust denier: https://www.scribd.com/document/254599625/American-Atheist-Magazine-Aug-1989

It’s to reduce odor, though I have no idea why one has ice and the other doesn’t

They don’t say who made the allegations or whether they were ever determined to be credible. This feels like another non-story where Rs make a lot of noise to stir up suspicion and conspiracy theories.