Quoted here in The New York Times in an article which calls to mind, as usual, nothing so much as a bucket full of eels:
“Trump and Steve Bannon are not alt-right people,” Mr. Brimelow said, adding that they had opportunistically seized on two issues that the alt-right cares most about — stopping immigration and fighting political correctness — and used them to mobilize white voters.
To The Times racism defines not just the alt-right but conservatism generally, such as believing in Obama's foreign provenance and therefore his illegitimacy to be president, or thinking Black Lives Matter is itself a racist movement, or advocating something more than birth within our borders is necessary to be a citizen, none of which could possibly be legitimate topics of debate because The Times believes they are settled matters and any other view means one must be a racist.
To question what is settled is unacceptable to The Times, and that is best dealt with by slathering on the racism charge.
Never argue the substance.