The most astounding editor's note I have ever seen

In what I can only describe as the most astounding editor's note I have ever seen, the editor of a piece in the Huffington Post entitled "Donald Trump Suggests Colin Kaepernick ‘Find A New Country’ After National Anthem Protest" included this at the bottom of the piece:

“Editor’s note: Donald Trump regularly incites political violence and is a serial liar, rampant xenophobe, racist, misogynist and birther who has repeatedly pledged to ban all Muslims — 1.6 billion members of an entire religion — from entering the U.S.”

It's not that any of these statements are false. I just can't believe that an editor felt the need to include this as a part of the piece and was allowed to get away with it. 

In fact, I'm so worried that some chief editor at the Huffington Post will see the note and take it down that I took a screen shot just in case.

Am I wrong to be as astounded about this note as I am?