Donald Trump’s convoluted and false claims about “fraud” are little more than a smoke screen for a more basic claim about who belongs, Jamelle Bouie writes. (Tam Stockton/The New York Times; Source photograph by Caroline Gutman/The New York Times) By JAMELLE BOUIE Donald Trump knew as well as anyone that he had lost the 2020 presidential election fair and square. He knew there was no conspiracy to commit voter fraud — no mysterious mail ballots, no “illegal” voting, no suspicious activity in…