"The term originally appeared online in queer forums"

"The absence of the term’s presence in Latin American speech and research highlights the critique of inaccessibility and incomprehensibility as Gilbert Guerra and Gilbert Orbea of Swarthmore College write, arguing the term as “a blatant form of linguistic imperialism.”"

"Aside from opposition based on its linguistic incompatibility, some claim that the term would lead to the “destruction of gender, a fundamental part of the Spanish language” and that attempts at removing gender from the Spanish language “advocat[es] for the erasure of Spanish.""

I know a Latino who thinks the whole thing is ridiculous.  He thinks "Latinx" is being imposed on his people by whites and makes his people sound like an alien race from Star Trek.  Imposing English gender language norms on Spanish is ridiculous - anyone in Spanish knows that Latino refers to both and isn't sexist.