New to all this

I have been lurking here for years, never remembering what my password or user name was. I am now feeling a bit nutty and want to ask a question . I probably have this in the wrong place, so I will apologize now. Newty said that Palestinians were "invented," what is he talking about? I did about a second of research, and it seems to me, that different this region has been called Palestine, or versions of that name, since nearly the beginning of time. I don't want this to be about the Israeli/Palestinian relationships, but I want to understand what this "historian" is saying. I realize that he is sending out a dog whistle to the right wing christian folks, but he must, be it may only be in his mind, has a reason. (Also, I use the term historian very, very, very loosely when applied to him. I've been married for 20 years to my husband, who just happened to have his BA in history...and Newty is no historian)