NATO is a military organization, BRICS is not. There is zero reason why India (or Brazil for that matter), not to mention South Africa would want to engage in any war with the USA or Europe. These countries have their own problems. The only country that is engaged in military warfare now is Russia because their leader lives in another epoch. As for China starting a war over Taiwan, I believe they learned a lot from Russia's mistakes and for now they are doing a lot to influence the Taiwanese using peaceful measures.