Please be objective: what is Trump and Elon Musk’s end game?

So Trump wants to kick out all the immigrants, exit all the meaningful international organizations and Elon Musk wants to fire a lot of government employees, but what’s their end game? What do they want to achieve? An all white country has no interaction with others? Low degree of globalization? Or sitting in the White House life long and have all the power until they die?

It doesn’t matter what they want is right or wrong, I want to understand first. Please no insult, no finger pointing. Thank you all first.

Edited: internal -> international