Let's give Mr. Grunwald a history lesson:

Most African Americans called themselves Negro in the mid-1950s when Kwame Brathwaite and the AJASS, a small group of artists and intellectuals, began using the term Black.

By the 1970s, Black was the term everyone used... https://twitter.com/MikeGrunwald/status/1324078001068384266

African-American wasn't a term used widely by Black people in the 1980s, when Jesse Jackson and Black intellectuals began using it. By the 2000s, it was also a widely-used term. @MikeGrunwald

Hispanic, Chicano, and Latino were terms used by intellectuals and activists starting in the 1960s, as the Chicano and Puerto Rican movements gained steam. By 1980, Hispanic was used by the Census. By the 2000s, Latino was the common term. @MikeGrunwald https://www.history.com/news/hispanic-latino-latinx-chicano-background

A lot of terms begin among intellectuals, academics and activists. Latinx is one of them, first emerging in the 2000s as a way to deal with gender and include those in the Diaspora who are LGBTQ.

While it may not be a widely-used term now, that is meaningless. @MikeGrunwald

White folks like to think they are the arbiters of what folks in a group decide or decide not to call themselves. That isn't true. Whether or not Latinx is widely adopted depends on a number of things. That will be decided by folks in a particular Diaspora. @MikeGrunwald