Because the hate that someone posts on the internet doesn't get deleted after that 2 hours, so it continues circulating even after a match. As a Brazilian I don't remember animosities being this high when I was a kid and didn't had access to internet, but people chanting mono to Brazilians really gets viral on Brazilian internet, so people take it much more personally and get much more riled up than it used to.
Because the hate that someone posts on the internet doesn't get deleted after that 2 hours, so it continues circulating even after a match. As a Brazilian I don't remember animosities being this high when I was a kid and didn't had access to internet, but people chanting mono to Brazilians really gets viral on Brazilian internet, so people take it much more personally and get much more riled up than it used to.