McGovern voting .. why go further?

How familiar is the following exchange?

“ McGovern-voting Granduncle: Let the immigrants in! We’re a nation of immigrants! You fucking bigot! You: Actually I’m not concerned about race, I’m concerned about why someone would choose to circumvent our immigration laws. How come I have to follow laws while we’re defining a whole class of people who don’t have to, and we don’t even know who they are? Hostess: Oh, stop fighting you two! Here we are having a lovely dinner and you have to bring politics into it. Just let him call you a reprehensible, cross-burning scum-sucking douchebag asshole xenophobe and then let’s move on! There’s cheesecake! —  House of Eratosthenes (via Ka-Ching!) ”