White supremacy isnt white nationalism and don can have his opinion and i dont have to share it, and i can still support him.

What else would i do, support hillary or biden?

There's nothing wrong with white nationalism.

Do you go to mexico and shame them for keeping mexican majority mexican or africa or china or literally any other non-white country?

I suspect you dont. Because its absolutely normal for ingroup preferences and wanting to live in a society of people you share common values, culture, the same holidays, the same language, and yes the same ethnicity with.

The left are the ones who brainwashed and taught that it was wrong to keep America majority white, and you're towing the party line.

Edit: as an example drive around the US, overwhelmingly you'll find black people living with black people, hispanic majority areas and white majority areas where asians tend to migrate into.

Of course these areas have others living in them as well, but as a mass majority even right now neighborhoods are majority one ethnicity. People do this subconsciously (or intentionally as well) because its normal to be with your own kind, this has been a thing since the caveman era