All of it?

The obvious flaw is you can't make a Tarzan movie without at least one white lady (i.e. Jane) but I guess maybe he was meaning there were enough to make one with the addition of white people rather than you could make a tarzan movie with only that group -- or else you could just cast traditionally white roles as black (e.g. Jane could be an african american and so could Tarzan) thus breaking societal stereotypes of who Tarzan and Jane are and what they represent.