First review above slams the people of the hills of Tennessee, assuming that they are backward, in-bred people. It's too late now, but I would have objected strenuously to that misguided garbage. The reviewer probably never met a real hillbilly, and no, "Deliverance" is not about real people, it's a fictional account invented in Hollywood. Please, you idiots, stop slamming mountain people. You don't even know any.
The problem I see with the movie is casting Anthony Quinn as a mountain man. I never saw any backgrounder that said he was an immigrant from Italy, Greece, or Mexico who moved to the mountains. With the character name they gave him, I assume they were seriously trying to palm Anthony off as a Tennessean. I did notice that they never actually showed his lips moving when he was delivering his lines: Anthony's accent wasn't identifiable as such, but it certainly wasn't TN mountains. I may well be missing something. But, one thing I'm not missing is the outright prejudice, and even hate, I see for the people of the mountains. Shame!