1.) You're an idiot and you don't even know the definition of the word racism, maybe you should try looking it up:
http://www.webster.com/dictionary/racist
White people are not the only ones who can be racist. Racism refers to "racial prejudice or discrimination." I have more racist black friends then I do white racist friends.
2.) If you were intelligent you would use the phrase "Intelligent people," not "Smart people."
3.) It is not in the white person's instinct to act like they aren't racist and that it doesn't exist. Racism is learned behavior and not part of instinct. So any attempt to hide it would be a conscious effort or learned behavior also.
4.) I think you should stop blaming racism and take responsibility for your own failures.