One positive development I came across in a NYTimes article on this subject is that the Texas board's influence on other states is not what it once was. Current technology makes it much easier for publishers to tailor textbook content to individual states, so that while Texas still establishes the default curriculum, other states are not necessarily stuck with it.

And yes, the board is making an overt effort at ideologically indoctrinating other people's children. In all likelihood, few if any of those board members have kids in Texas public schools--private schools and especially Christian schools are much more prevalent in the South than other parts of the country, so those board members' kids were almost certainly being indoctrinated with this tripe and worse already. This is purely an abuse of office to spread their conservative agenda.