You may be able to fix this just by changing your wording a bit. I don't know though.
As an example, I spoke with someone recently here in Florida that supported the "don't say Gay" bill for no other reason than, "it pisses off liberals." There's far more tribal support/opposition to things that have nothing to do with logic or reason. My neighbor is a prime example.
Related to that bill in particular, I feel you got it wrong with, "Those who support (the "don't say gay bill"):
> "Believe progressive ideas are dominating public education. Instead, parents should be the ones in charge of their children’s education — especially when it comes to determining what topics their children are ready for."
This is just my opinion here but I really feel this completely misses the boat in regards to the opposition's argument. They don't feel that "parents should be in charge of their children's education" because that would mean that some gay couple with an adopted child could make those sorts of decisions. They don't want that at all!
Also, who's to say that teaching (or even discussing with) K-3 kids basic facts about sexuality is bad for them? Those that support the bill do! That is their argument: That their beliefs about sexual education are the only ones that are acceptable. Not that they think, "parents should be in charge..."
"Believe progressive ideas are dominating public education. Believe that teaching children about sexuality or gender identity is morally wrong and such topics should be prohibited from classrooms."