There aren’t any rules stating that Klaipeda/Orsha aren’t for Brazilian players.
However, some people have been trying to imply that this is the case because the steam download refers to Tree of Savior as the “English Version”, which only means that the text of the game is in English.
The “GTFO BR” trend is one of several slurs with a decent amount of history in the gaming community; I remember these slurs as far back as games like Lineage 2, and it wouldn’t surprise me if it was something that was said even earlier than that, but other nationalities had similar slurs.
The main reason the BR slurs likely stuck around compared to others was due to people creating derogatory images, which only enforced the whole “HUEHUE GIBE MONE PLX” thing. It circulated and turned into a meme.
A similar example of this would be Russians in games like Counter-Strike or DOTA 2.
I wouldn’t be surprised if half the people saying things like that actually had no opinion/idea on the matter, and are just repeating what they saw on an image somewhere.
To answer your question: it’s not okay. It’s just a minority of people being excessively vocal about their regressive opinions. And since IMC doesn’t seem to be doing anything about this, it’s up to the community itself to speak up against these actions and show that it’s socially unacceptable to be so blatantly xenophobic.
Also, the Homestuck thing is unlikely.