Actually, most of these revisions didn't happened until very recently. The Texas Board of Education didn't really become extreme right wing (or at the very least, didn't propose rewriting history) until sometime after the tea party movement, before that point most of the textbooks were pretty typical. Arguably the only bias that exist before then are related to world history rather than American, but that's another issue entirely.

So unless Animeniax is still in highschool or graduated within the last 2 years, he's largely unaffected by right wing bias of the current Texas education system.

If facts are going to be brought into the argument, it should be presented base on how it actually happened and within context.