You would have to ask the FBI what their "real proof" is. My guess is they'll tell you to go pound sand, but the FBI typically doesn't issue warnings without good reason
As for bigoted, you'll have to explain that. Start with the definition:
"obstinately or unreasonably attached to a belief, opinion, or faction, in particular prejudiced against or antagonistic toward a person or people on the basis of their membership of a particular group."
I don't think "South America" is a particular group. It's a geographical location, as far as I know.