Just like Republicans are nothing like what they were under Lincoln and Teddy Roosevelt, so are progressives nothing like Hitler's National Democratic Socialist Workers Party. In reality, Republicans are far more like Hitler and his followers - espousing hate for specific groups, getting their constituents all riled up against those groups. In Hitler's day it was hatred of Jewish people, today in the Republican party, it is a generalized distrust and dislike of all Muslims. Obviously, labels don't hold up over time. Hence, making weak comparisons based on labels just demonstrates a person's lack of analytical ability.