It's a bizarre thing, isn't it. They say they are for "white culture". Yet there is no such thing as white culture. Italian culture, English, and yes German, and on and on, but there is no such thing as "white culture". They are disconnected from their real cultural roots (as that would inevitably reveal various races), and have latched onto this Nazi thing and this psuedo-culture of angry whites.
Something I think the radicals of all persuasions have in common: a worldview that depends on them being persecuted. Using whatever distortions, lies, and myths necessary to ensure that they stay persecuted. Radical Muslims and Christians do it to such an extent as to divorce themselves from their actual religion. The persecution gives them their validation.
So I agree, flaming poop or Star of David stickers is exactly what these people want. Don't give it to them.