Why is calling someone a rascist and dismissing them so much more fun than having a intelligent conversation ?

I'm not interested in political correctness.

But racism is seriously ugly.

And the quote is nonsense. Who, exactly, is keeping this kind of ugliness alive?

https://www.abc.net.au/news/2020-05-06/coronavirus-woman-racist-attack-in-melbourne/12216854?nw=0