Why are people worried about Donald Trump sharing an article with upside-down pink triangle?

US President Donald Trump has come under fire after posting an opinion article from The Washington Times on his social media ...
USA Today

Trump shared an article with a pink triangle symbol: Why critics are alarmed

In a Truth Social post on Sunday, President Donald Trump shared an article with a promo image depicting a symbol previously used by Nazis to identify gay men during the Holocaust. The opinion article ...