Frankly I think that poster is a crypto-fascist trying to do crypto-fash-washing. It reads like the first three passages of the Narcissist Prayer.

It isn’t a Nazi tattoo. It's a skull tattoo.

That didn't happen

Its missing the key feature of the SS skull, which are the cracks in the skull. It's a skull tattoo that is entirely too close to a Totenkopf.

And if it did, it wasn't that bad

I'd also like to say, that if everyone starts pretending that Totenkopf was just a thing we all knew about like Swastikas, I'm going to lose it. You absolutely wouldn't look twice at it in 99% of real-world situations.

And if it was, that's not a big deal