Oh, boomer conservatives heard about otherkin back in the 90s around the time of the elfinkind usenet forums and mailing lists. And they've been malding about us ever since. A lot of them encountered otherkin around the same time as trans people, and to them, transness is an extension of otherkinity.
Historically, otherkin communities have argued that self-identity is more important than the veil of material reality. Although today many neoliberal trans groups are realist and conform to reality, in the boomer conservative mind, the queer movement has always sought the downfall of mundane human reality. And I say: good. Fuck this socially hegemonic subjective consensus reality presented by the modernists as objective. I seek a future age in which humanity use reality's inherent subjectivity to manipulate reality, and thus become as gods. The rich are going to manipulate our subjectivities to support their capitalist reality either way. It's time for the working class to take this power back for ourselves.