Hold on a sec. I see where you're coming from here and it's good impulse to try to address the most charitable interpretation of an argument but you've gone past "charitable" into "gullible".
Even had he not quoted the "fourteen words" slogan, the words themselves have a plain racist meaning.
I feel compelled again to remind people: there is a reason we have "black history museums" and not "white history museums", and it's not because "all history is white history". It's because there is a coherent black culture, which was created by the forced relocation of African people to the United States, a process which stripped them not just of their original culture but of their very names.
There is not in fact a coherent "white culture". There are Irish Americans and there are Italian Americans and Polish Americans and Anglo-Americans and German-Americans, all with their own museums and parades and cultures. There is not much overlap between Irish culture and Italian culture: they don't eat the same foods, speak the same languages, or play the same music.
"White" means a lot of different things; it is a fucked up term in the same sense as "hacker" is. You have to evaluate it in context. So when I say "I hacked a bank", you know I did something that was very probably illegal, and when I say "I hacked together a PDF renderer" you know it wasn't.
But the original meaning of the term "white" is racist. It's the term Anglo- and Germanic- Americans used to make common cause with the Irish and Italians Catholics they'd been hating at the turn of the century, when the end of Jim Crow escalated the threat they felt from black people. In fact, to this day, a significant faction of white nationalists that Italians aren't white.
"We must secure a future for white children" is like "I hacked a bank". It's intrinsically racist.