Blackface is wrong & racist whichever country it comes from.
I have Pakistani friends who have made racist comments on occasions about darker skinned people & black people such as Obama in the media & I have called them out on it & they have apologised but I'm left feeling that such views are quite widespread in Pakistan.
In Pakistani culture pale skin & blue or green eyes are seen as the ultimate sign of beauty.
I don't know if it would even occur to the beauty industry there to use a black or darker skinned model even to portray African culture.
There are a lot of other issues going on in Pakistan at present, for example 1000s have been killed by the Pakistani Taliban & by ISIS but that doesn't mean that this issue should be ignored.
A lot of people from various Asian countries have the view that paler skin is somehow preferable- I don't know if it partly dates from colonial times?
It's sad that people can't just accept their own skin colour & the varying skin colours of others in the world.