Is this guy a Nazi? Has he shown ANY inclination towards National Socialism or overt racism?
If not, then you are falling for the Left's agitprop.
And yes, we should be intelligent enough to discern the difference.
However, elections are about winning votes - not about having to come up with involved explanations as to why you're wearing the same unit insignia that Josef Mengele wore. An independent voter sees a picture of a candidate in that insignia, his immediate reaction is "Next!" not "I wonder if he has an innocent explanation for this?"