As a mixed UK teenager, I am not surprised that the next Olympics are set in Brazil. That is all.
I'm trying to draw on a knowledge base which outstrips my own. Hence the space combat thread, which i know next to nothing about, and the same goes for terrestrial combat. In cases like this, i just want to see what you think.
In light of that... You being a mixed
-race (I assume you mean) UK teenager doesn't appear to me to have much bearing on this at all. Although I'm assuming you're referring to the European/African/Amerindian hot-pot that forms the 'typical' Brazilian citizen's genetic make-up, and that you relate (proudly, I reckon... and why not?) to this "every colour under the sun[1]" mish-mash, and you reckon it was inevitable that this aspect would draw the bids to them.
At its most simplistic, I think there was more an element of "South America[2] hasn't yet hosted a Games", if anything. Every other (bidding[3) continent has hosted the games before. Rio has bid four times, I think, and... hmmm... somewhere else in that area? Buenos Aries? I probably need to look this up.
Obviously the bid teams will also have have had to prove that they
can do this event. I forget, though, did Rio also get the World Cup prior to this? (FIFA has an actual egalitarian "we ideally need somewhere in <foo region> this time round" policy, that shapes the shortlist of bids... plus S.America is a strong participant/host country.) If so, that might even have tipped the balance somewhat.
As to what
actually swung the vote, you'd probably need to get (vaguely honest) answers from those delegates that bid. I'm not sure that information is so easily obtained, though.
[1] Pretty much literally.
[2] Mexico City has bid a number of times, and succeeded once, which might have 'sufficed' to hit that 'quota' in the past, but realistically it's "Central American", not "South American".
[3] Can't immediately recall any African locale bidding (
edit: Sorry, I forgot Capetown's bid, failing against Athens' recent "Olympics coming home" occasion!), and I don't think any Antarctic location has either...