Oh I got him to agree that the NSN should be openly repudiated by any of the "reasonable" people who were just there for every day run of the mill racism. He is one of those people who is "just using common sense". He unfortunately is a fan of the Gish gallop and one of the biggest frustrations for both of us is that I kept tackling his arguments in order starting from the first.
Look I get it, he has worked hard (and I know he has that's not just hyperbole) and feels indignant that this means he has to pay a larger share of tax than people who are not as financially sound as he is, and so some wannabe populist talking head telling him "Oh it's all the immigrants soaking up the prosperity of the nation!" is compelling. When I pointed out that if we just taxed big business and big finance correctly he started to come around, before haring off down some other tangent.
Ultimately I think I will just have to avoid politics, bit awkward to be arguing with the person who decides if your lease gets renewed when it expires. But if it does come up I might just start throwing out figures for Fuel Tax Credits paid to mining companies, or tax avoidance by tech giants, or multi-millionaires and billionaires funding political action against the best interests of voters.