oh boy... thank you!
Brazilians are passionate about their (e)sports, tbh brazilians tend to pick a side on any subject, specially in a contest. If there's a brazilian native we will prolly support her/him, if there's none we will still pick a side, and most are usually faithful for that single pick from that moment on, kinda like a kid picking his first football to cheer. We even pick side/teams on stuff we don't care, as long as there are sides, we pick one, and we cheer, and we will be picking on friends if their side loses the deal. specially if its defeat if for ours side... even with things we don't give a single fuck, we still pick sides because when we chat about that particular subject, like in a pub or amongst friends who do give a fuck about that particular sport/contest, its like we do give fuck, but we just enjoy the mockery and teasing against the other side. It's almost like a cultural thing. And never let they notice it bothers you, otherwise they will not stop.