According to Wikipedia, "Hydra first appeared in Strange Tales #135 (August 1965). In its original continuity, it was headed by nondescript businessman Arnold Brown, who was killed as S.H.I.E.L.D. apparently crushed the organization. Hydra soon returned, however, headed by Baron Wolfgang von Strucker, with the support of the Nazi Red Skull."
As part of Secret Empire's marketing campaign, Marvel is initiating a "Hydra takeover" of popular websites, presumably Marvel's PR arm which unofficially includes Newsarama, Valnet Presents CBR, and TVandMovies.com. Luckily for you, True Believer, Axel Alonso hasn't responded to my request to sell out. This campaign has expanded from comics news sites to brick and mortar stores with the offering of Hydra Staff t-shirts to be worn by staff throughout the event.
I can't sum up this fuckery as well as Nicki Coley did, so here's their tweet.
We've also been asked to change our store logos to Hydra symbols. My staff are LGBTQ, Jewish, or both. We are no longer hand-selling Marvel. https://t.co/gQnBfBZC8L— Glamour Toad (@NickiColey) April 20, 2017
And fittingly enough, pun intended, the shirts are only available in Large or Extra Large.
P.S. Hydra clearly aren't Nazis because Steve Rogers killed the Red Skull, and if there's anything that definitively proves you are not a Nazi, it is killing the head Nazi and taking his place.