No, this Olympics will not bring the world together. In fact, I think these Olympics in particular will bring a smaller number of people together because of all the crime and pollution & other issues they are having. Let's not also forget the fact that this country simply could not afford these games and is a country that still has many citizens who live in slums. Instead of helping citizens, they choose to host the most fleeting and expensive sports competition possible to the tune of multi-billions of dollars.
This Olympics is having a variety of issues which have made various athletes not go, pay for reasonable living accommodations (NBA players have rented a luxury cruise ship, I could not applaud them any more than I already am), and a fair number of visitors and athletes fear for their safety in Rio and it's surrounding areas.