By comparing Breitbart with Nazi you're being incredibly disrespectful to the actual Nazi victims.
[1] https://store.breitbart.com/collections/mens/products/e-plur...
https://store.breitbart.com/collections/all-products/product...
The US eagle has its wings going up, not straight sideways. And the head is pointed to the eagle's right, not the left. (This is also the difference between the reichsadler, which is a more generic symbol of Germany, and the parteiadler, which is a Nazi symbol: the riechsadler's head points to the eagle's right, while the parteiadler's head points left.)
Just compare:
https://en.wikipedia.org/wiki/Great_Seal_of_the_United_State...
https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Pa...
The one on the shirt is quite close to the second (minus the swastika) and quite distant from the first.
https://en.wikipedia.org/wiki/Coat_of_arms_of_Germany#Nazi_G...
In any case, that shirt design screamed "Nazi!" to me the moment I saw it. I didn't set out looking for Nazi symbols, either, I was just browsing to see if there was anything that might be considered offensive. I was rather surprised that they would be so brazen. I can understand if you don't think it's sufficient, but I do.