The phrase has its origins in Arab nationalism. It was coined in 1960 by the PLO to refer to the goal of an Arab state that occupies the entirety of what was Mandatory Palestine. If you ignore the subtext of “what happens to the Jews in that situation” I suppose you can make a case for it.
It’s like the confederate flag. In the 20th century there was an effort to rehabilitate it (as in the Dukes of Hazzard) as a symbol of anti-authoritarianism. And that’s the only connotation lots of people have of it. But it has a pretty unpleasant historical context.
At the very least it’s a dog whistle to the large fraction of the Muslim world that hates Jews: https://www.adl.org/resources/blog/adls-global-100-survey-wh.... Americans who use this phrase should really travel to the Muslim world to understand the antisemitism that’s just in the air. You can’t travel to my “moderate Muslim” country with an Israeli passport. Guess why that is?