Not at all; it was always in them.
Speaking as a biracial Black woman who’s directly related to deeply prejudiced people, not everyone who’s a bigot realizes that’s what they are. They often think that racism is only lynchings, bombing churches, and burning crosses. (Hint; it’s not.)
Racism isn’t the only reason we’re in this current clusterfuck; classicism and sexism play a huge role, too.
My problem is with your apparent assertion that someone voting for Obama must automatically mean that person “can’t be” racist; that’s some deeply fallacious thinking, there.
And just to add some humor to my point: