"I don't believe in racism... sexism.. or any ism."

I just saw a commercial that included the above quote. I didn't really understand what the commercial was trying to say, other than to tell me - the viewer - to click on the site of the TV channel on which the commerical was airing.

But it led me to think:

1. The commercial was ripping off a line from Ferris Bueller: "Isms in my opinion are not good. A person should not believe in an ism - he should believe in himself."
2. If you reject theism, atheism, and agnosticism, where are you left?