These people make themselves look foolish in their analogies.
Putin is not Hitler and the Russians are not Germans.
The dynamics of 1939 Europe are far from similar.
The one similarity that is striking is Hitlers warning in April of 39 to the Poles about the brutal treatment of the ethnic german population of the Danzig(Danzig was ceded to poland as Ww1 reparations)
Putin has made similar statements about the treatment of ethnic russians in the disputed territories in the past.
Please get your history right. Danzig was an separate city-state, it was not ceded to Poland. https://en.wikipedia.org/wiki/Free_City_of_Danzig
A better historical analogy would be Hitler’s “warnings” about Sudetenland