I meant the thumbnail appeared after he pressed "post", not that the article was edited. I say likely because as a software engineer I know how thumbnails generally are loaded on sites like these. They're not part of the "post" data, and appear a short while afterwards as the site fetches metadata from the linked site and creates the thumbnail in the background so it doesn't force the user to wait.
I would say maybe snopes can't tell the difference between posting an image vs posting an article and have an automatic system generate the image, but what actually is going to happen is the maga people are going to say "see, I knew the fact checkers were biased. They intentionally make bad faith articles like these"
You don't need to convince me that trump is a horrible person.
However the words used in OPs title are misleading and bad faith. As for who saw trump's post, sure it matters morally, but it isn't what I'm trying to point out here.
"Trump posted Nazi era symbols" is disingenuous and doesn't help our side.