Leftists in the majority don't want any religion above or beyond their own -- which is the bulk of the scientific community as well as the educators. A good majority of atheists are leftists. And, before any of those atheists put their superiority cap on -- you accept subjective realities over real biological ones or empiric findings, so nah, you're not smarter because you joined that club.
Anyway, nothing irks me as much faux-secularism when it's more a case of eliminating religious access to an audience while simultaneously overloading on leftist social constructs, ideas, and thinking. What the champions of this approach really want is a complete shut-out so they continue prattling on about their political and social agendas uncontested.
To the last point, children are not learning rationality in schools -- they're learning science babble and subjectivity that aligns with popular leftist viewpoints. Many religious viewpoints for example have no problem when data indicates that something in their religion may be wrong, but certainly reject subjectivity for what it is -- and err on the side of their religious beliefs in these gaps. Modern day "objective viewpoints" will often double down on their errors and stupidity at every turn. It's a topsy-turvy world we live in these days when the scientific community is more dogmatic than the preachers, lol.