These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Unfortunate Implications: Apply the movie's own Aesop to itself. Thaddeus played by a white guy would have been a more educated, wealthier, less likeable version of Archie Bunker, while Louis and his family as black would have played into the "blacks are an ignorant, stupid, foolish race that needs to be protected from themselves for their own good" stereotype.