i hope it isn’t a bother, but I never heard of the ‘ group of white girls who were pretending to be Japanese’ thing with those claims…? what was that situation?

It was a group of girls who called themselves the Yandere Bitch Club. Most of their blogs have been wiped off the net, but you can still see evidence from people who experienced them first hand.

http://jacgayline.tumblr.com/post/138009435938/what-is-the-context-of-that-last-post-because-holy

http://senjougahara13.tumblr.com/page/4 this blog also has a lot of information about their past antics.