The attitude is also a very common one among the non homophobic Latinos.

Except tacking an x on to the end is not a common Spanish pronunciation and completely discounts how jarring that is to use in speech. The whole thing also stems from a fundamental misunderstanding of gendered language, Latino can already be used to refer to male/female/nonbinary, just as the word for person (persona) can refer to any gender despite ending in the feminine form of -a.

It comes across as "Wow, so maybe you weren't aware, but your language which is fundamental to your entire culture is like... Really problematic??? I heard it uses gendered words and that's just like really micro-aggressive and could be offensive to people. Here, let us fix your language for you. What? No I don't know any Spanish and don't plan on learning."

But even those who identify as different genders or none prefer latino/latina, ask them, the lbgtqs would always be the ones saying they don't like that term in college here in california at least.