Admission ticket to the 1933 Presidential Inauguration

I'm wondering why this is marked as Offensive Content / Trigger Warning — there is nothing inherently triggering about this, it's a historic document if anything.  

We agree! Seems to be an accident. Thanks for letting us know!

Maybe "triggering" isn't quite the right word, but many east Asian viewers, particularly South Koreans, could find the Japanese rising sun offensive, depicted on the back of the ticket. Similar to the way an American or European might read a swastika, the 16-ray rising sun symbol represents wartime atrocities such as occupation, forced rape, and racism. abuse of human rights. FIFA bans the symbol, and it was contested at recent Olympic games.

The ticket itself is from Roosevelt's 1933 inauguration (and VP Garner) in which both won by a landslide on plans to address the Great Depression and gave the inspiring speech "the only thing we have to fear is fear itself." It is in the collections of the Smithsonian and the FDR Archive (among other places). Can anyone imagine why the Japanese rising sun motif would be included on the ticket?