Why on earth are they bothering you about one racist comment on a website you don’t own, run, or moderate?
Now, for example, if I post about the Elbonians, using the well-known racist slur “Mudsuckers,” and make a joke about the Elbonians, like “How many Elbonians does it take to change a lightbulb? None, the mud shorted the socket!”, well then they could tweet about LGF.
(Waiting while everyone looks at a map to find Elbonia.)