That's an absolutely ludicrous statement to make, for lots of reasons. Half!? I'm going to just leave some actual, scientific studies instead regarding race and gender in movies.

(17% of movies didn't even have a single speaking black character, as of 2013)

http://annenberg.usc.edu/pages/~/media/MDSCI/Racial%20Inequa... http://annenberg.usc.edu/pages/~/media/MDSCI/Gender_Inequali...