A google image search for "jig dolls uk" gives a lot more dancing leprechauns than blackface ones. Are they anti-Irish to the censorial mentality?

Doing a search that would include more blackface ones, it looks like about half of those were created by African-Americans for themselves.

Probably some of the caricatural white ones with upward-pointing noses, scarlet cheeks and silly grins were created by people of African descent too. In fact if I was an Afro-Caribbean making one now I'd see Trump and Johnson as a caricature-sculptor's dream.