Every region do it
im willing to bet you if you opened a proffesional players DMs, you will see death threats from people of all ethnicities, the reason people target brazil is because of the comfirmation bias of them being toxic people, when in truth, its not like that
some of the things i see on this site and on twitter is borderline xenophobia, but when someone of that nationality calls them out on that, they get ridiculed