The more you engage with toxic Stans the more toxic your timeline is. And guess what that toxic behaviour doesn't always start with the other fandom but from the people you choose to follow who are always getting into these useless fights.
U can have a very peaceful tl if u choose to follow the correct people.
And don't forget with what tweets you interact be it in likes,rt
I have been on kpop Twitter mostly last one year and I'd say I have done a good job avoiding as much toxicity as I could