:According to Stephen Sondheim, the problem was the previous two lines. In the original, it read: 
 : 
 ::My father is a bastard,My ma's an S.O.B.My grandpa's always plasteredMy grandpa pushes tea 
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 :United Artists "flinched", so it was changed in the movie to: 
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 ::My daddy beats my mommy,My mommy clobbers meMy grandpa is a Commie,My grandma pushes tea 
 : 
 :So it wasn't McCarthyism, it wasn't alcohol, it was "bastard". (He also wanted to have the song say "Fuck you", but had to settle for "Krup you", which he admits is funnier.) (This is all from the wonderful Finishing the Hat by Stephen Sondheim.)