When I say "secular humanism", I'm referring to a specific atheistic philosophy of tolerance. When you say "secular humanism" you're almost definitely talking about the theory of evolution. As a result we talk past each other.
I strongly object to barring the teaching of what is accepted in science because there happens to be a secular religion that borrows some of the tenents of that science. Like it or not - and I know you don't - evolution is a basic part of the scientific consensus. Leaving it out of the scientific curriculum because we are kowtowing to religious prejudice does a serious disservice to both science and students.
By all means, schools should not be teaching an atheistic theory of universal tolerance for all. But my support for that should not be twisted into support for removing evolution from the science curriculum.
Cheers,
Ben