"otherpaws are retards who need special titles to separate themself from any other roleplayer" in that case, so are otherkins. They are also using special labels to separate themself from any other identity.
This is just wrong. Otherkin is not roleplay, it is a spiritual and sometimes physical identity that one cannot simply manifest. It is worthy of it’s own classification due to its unique requirements and parameters in contrast to other forms of nonhumanity.
Otherpaws, on the other hand, as a grouping and identity, evolved directly out of cultural appropriation. The masks and things they use may not be a universal trait of therian culture, but most users of them are therians. They saw that we had these things and wanted it for themselves, then took it, giving themselves a new special title to try and avoid the inevitable backlash they knew would occur.
There is a fundamental difference.