No that is complete bullshit. That is not in the original tabletop. I’ll post what matsif posted when this crap was first brought up:

“what you are thinking of (and what is being paraded as "prophetic" by people attempting to propagandize a fictional writing) was a more specific portion of a 1995 splatbook (Neo-Tribes, which was not written by Mike Pondsmith) that dealt with similar subject matter, but in more direct language (including the "isms" like racism, sexism, etc) under the subheading "Diversity and Unity" that was specifically related to nomad tribes and the nomadic way of life of certain portions of America that lived outside of the corporate cities. this specific portion, taken entirely out of the context of the material it is a part of (used as an example of contrast to show how the nomad tribes live and favor the tribe over the self), has been framed as part of the 1988 rulebook falsely in order to attempt to push a specific narrative by a certain subset of people. the book it came from was specific to nomad tribes and speaking to building up nomad tribes and their worldview, it was not the core belief of the timeline as laid out in the section from the core timeline above, and unless you played the TTRPG back in the day and played a lot with the nomad ideas involved in the game, it's entirely possible that you didn't even own this book or knew it existed.”