Not that we shouldn't trust newsweek based upon history, but having a error 404 code is quite common. It can mean a LOT of things and happens all the time on things of which there is no attempt to destroy the information.
"The web page for Charles C Rogers showed a 404 error on Sunday and the URL was also
reportedly changed from 'medal' to 'deimedal.'"
I can find things on the web on Charles and obviously the government only controls it's site.
Here is one that lists him
https://valor.defense.gov/Recipients/Army-Medal-of-Honor-Recipients/
Here is another
https://www.cmohs.org/recipients/charles-c-rogers.
Here is another
https://www.army.mil/medalofhonor/citations26.html
I think you found in the media the boogey man! Life can't be fun looking for racism behind every media or tree. Had there actually been an attempt to denigrate a medal of honor member by Trump that would be despicable. Thankfully, that never happened or would happen.