Your earlier comment points out, correctly, the genocide requires a plan to eliminate an entire people.  As the breadth of small-pox blanket episode has been ludicrously exaggerated over time it is evidence of no such thing beyond the fact that some people are horrible.  Given that it's main, demonstrated use was during the Fort Pitt episode it ranks as crude biological warfare at best - a footnote to the Western Front in WW1, the Kurds in 1991 or Syria today.

Also, initially the Nazi's may have 'planned' to send the Jews out of Europe but given how quickly they moved to an extermination program I would suggest it never moved past the discussion phase.