I'm late to this, but honestly don't get the uproar. Normal people visit everything from concentration camps to Hitler's bunker in Germany. It's surreal how the touchstones of Jewish genocide are now tourist attractions—and that's exactly what Cawthorn wrote! Note the underline:

Oh, I see, Cawthorn's Democratic opponent posted the Instagram but *cut off the part where Cawthorn calls Hitler "a supreme evil"* and the tweet went viral. Seems bad!

As ever, I am not here to confirm your partisan biases, but to tell you the truth as best as I see it. That's because I respect my readers and you deserve no less. I've written plenty about anti-Semitism in the GOP, this is not what it looks like. This, on the other hand: https://twitter.com/Yair_Rosenberg/status/1291831804949860353

There's actually an entire genre on Instagram of Auschwitz selfies! The difference here is that Cawthorn was actually pretty self-aware about the moral dissonance of the situation, which is not the case with those folks. https://www.google.com/search?ie=UTF-8&oe=UTF-8&sourceid=navclient&gfns=1&q=auschwitz+selfies https://twitter.com/knucklesjak/status/1293216848746557440

If calling Hitler "a supreme evil" is actually a pro-Hitler dog whistle to white supremacists, then words have no meaning. To quote a wise politician: C'mon man! Don't let Twitter break your brain.

"Why did he delete it" is a silly question if you think about it for two seconds. If people were selectively screencapping your vacation photos on Instagram to wrongly accuse you of being pro-Hitler, I suspect you'd delete them too. Though there are no good options there! https://twitter.com/Yair_Rosenberg/status/1293219761715916800

For those unaware, Eagle's Nest is a famous and popular tourist attraction, as it's the site of an Allied victory over the Nazis. It is not some sort of pilgrimage site for Nazis. (Hitler didn't even like the place!) https://en.wikipedia.org/wiki/Kehlsteinhaus#Allied_capture https://twitter.com/SababaUSA/status/1293222722340823040