The actress Sydney Sweeney stars in an advertising campaign touting her “good jeans/genes.” A few crazed left-wing commentators on social media interpret this as support for white supremacy. Right-wingers on social media pick this up. Ultimately, the story winds up on Fox News and becomes a national issue. Even though no prominent Democrats say anything about it, the entire party is tarred with the extremist position. The right wins another battle in the culture wars.
The left, on the other hand, has no similar mechanism to attach neo-Nazi views held by a handful of extremists to the entire GOP. To some extent, this is due to the fact that the top of the left-wing media food chain takes journalistic responsibility more seriously than Fox News. Nevertheless, something has to be done about it, or the blue team will always be playing defense in the culture wars, because there is no practical way to make its extremists shut up.