SJW != social justice
The best example is the atheist community that was about atheism. Some people "hijacked" that community and pushed for "atheism +", where now it was no longer enough to be atheist, you had to also be an intersectional feminist, pro-LGBT+,anti-racist, anti-islamophobia... not that it is a bad thing but it has absolutely nothing to do with atheism. So "atheism +" gatherings ended up talking about anything but atheism itself, since it had now to talk about representation of women, LGBT+, minorities in conferences.
edit: