Classic dog-whistling. Completely obvious to the target audience, with just enough plausible deniability that they can loudly proclaim innocence when called out. Just like the inverted red triangle used in Trump campaign ads last month, and the Trump baseball for sale on the same site as that t-shirt for the extremely specific price of $88. 88 is a number with a long history in nazi circles, being their “code” for “heil Hitler” (since H is the 8th letter of the alphabet). Once might be dismissed as innocent coincidence - but these “coincidences” seem to happen with remarkable regularity. Somebody in the Trump camp is very actively courting the neo-Nazi vote.
