I don't find that article supports what you are trying to claim. As they point out, the lack of discrimination allows people to be more open, even to themselves, about their sexual orientation. Kinsey studied this idea back in the early 1950's and came up with the
Kinsey Scale -- and found that, however they self identified (since homosexuality was discriminated against, including being illegal in most areas), a large number of people are not strictly heterosexual.
"Cisgendered" was coined a few decades ago, to be a clarifying term when discussing Human Sexuality. Yes, there are now some who are trying to use it as a derogatory term, but those are a minority, and is no different (and in large part because) you are using transsexual as a derogatory term.
And can we drop the child abuse crap -- the fact is that vast majority of Americans, both on the left or the right, are against it. It is used in these contexts purely as a "scare tactic" to generate hate against people who are already discriminated against.
Never.
Transgender is an old term, at least 40 years old -- if not older. Transsexual is the term for people who believe they are the opposite gender than the sex of their body. Transgender has been a term for those that don't feel as if they fit in the male/female binary. From my experience, there have always been more transgendered than transsexual, by a wide margin.
I can't speak for all 13,800 (or so) school districts in the US but, from the evidence I've seen, only a few (maybe a dozen) have ever taught the 1691 Project in any of their schools.