Interestingly, the swastika is much older than Nazism, originating in India, IIRC -- also the Indians (Native Americans) had a symbol which was the mirror-image of the swastika and meant peace, being the [representation of the] crossing of two arrows, each broken twice -- moreover, the 'swastika' (Gammadion Cross) appeared in early christian art where it was representative of the trinity [hence using Gamma, the Greek third letter, as the basic shape] as told by the four gospels [hence repeating four times, as the arms], and joined at the center [likely because they were all telling the same thing, that is the good news].
While everything you say is true, whatever the swastika meant in 1930, it means something very specific now.
My client had no business wearing those tatoos.