If you are unsure of what he meant, try and explicitly advocate for "majority white, straight, Christian(ish)" people in the same way every other group gets to do in america and see how it goes. And if your knee jerk reaction is to say "well only a racist white nationalist would do that", you have proved my point, and you are using the same fallacious reasoning that leads to people thinking that all gay rights advocates are pedophiles or all criminal justice reform advocates are thugs.