Well, obviously not anymore, but since he belongs to a sect of Christianity (Hebraic Roots) that incorporates Torah law and certain Jewish traditions, can you blame me for getting a little confused?
I can't speak to his beliefs or identity without further research, but Messianic Judaism is a thing, and most identify as Jewish (source: my wife belongs to such a congregation). From this writing, I'll assume that's his belief, as a common tenet is referring to Jesus by his Jewish name.
To be clear, "Jewish" can describe a person's religion, culture, or genetics, and other traits if you want to dip into stereotypes. It's definitely possible to be just one and not the others.
nothing actually. historically and to this day these cultures coexist in peace and respect for the most part (having mutual respect for abrahamic roots). within the middle east and far outside of it.