This feels like mansplaining. I'm not sure what the correct term is, but watching a Brit tell an Israeli that they don't know their own country's history is surreal.
I believe that if I were to read a pamphlet on US history, and then go to the USA and quiz random people on it in the street, within fifteen minutes I would find someone born there who knows jack shit.
If this was an actual simple border dispute, I'd be more inclined to listen to anyone who didn't have direct knowledge, but since this conflict hearkens back to literal Old Testament days, I'm more inclined to believe a native.