Anonymous: If I go to some foreign country (say, Algeria) and start insulting people with racial slurs, since I'm the minority and there's no institutionalized racism toward Arabic people in Algeria, would it still be racist to insult them?  Because that's how it works according to you: racism = prejudice + power, but I don't have power in this case. 

No you still have power there, even if you are a minority in that country.  White supremacy is pretty much a world wild thing.  It’s dependent of the situation you’re in but in some countries you might be let off because of your skin colour.  White privilege exists in non-white dominated countries. 

- Vicky