Since the 1970s –– and perhaps even earlier –– the Left has been vying for the minds and souls of our children. But what was less obvious back then is front and center today, especially on America’s college campuses and in our public schools.

In Illinois, SB (Senate bill) 3249 is known deceptively as the “Inclusion Bill.”

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If this bill passes, it will require that teaching history in a public school include a study of the role and contributions of lesbian, gay, bisexual and transgender people in the United States and in Illinois.

“SB 3249 and its companion bill, HB 5596, have been moving forward in both the Illinois Senate and House,” Laurie Higgins, a cultural issues writer for the Illinois Family Institute (IFI) and its sister organization, Illinois Family Action, explained. “The bills’ sponsors have until January 2019 [to move the bill forward]. Currently they don’t have the votes, but there are rumors that an amendment may be proposed to make the bills more palatable.”

Still, “there is no amendment that can make this radical bill acceptable,” Higgins told LifeZette. “The sponsors seek to shape the moral views of children and teens by associating noteworthy cultural contributions with homosexuality, and the ‘trans’ ideology. Of course, cultural contributions have no bearing on the morality of volitional activity, or the volitional acts of those who identify as ‘trans’ –– which is why these bills are so insidious.”

Like Higgins, Michelle Cretella, M.D., a pediatrician and president of the Florida-based American College of Pediatricians, is strongly against the bill.

“Affirming homosexuality and transgenderism does not respect the views of students, staff, and parents who, as a matter of conscience, hold traditional moral and religious beliefs regarding sexuality,” she told LifeZette. “A public school should promote and respect only optimally healthy behaviors to its students. And respect for diversity includes respect for a diversity of moral convictions about homosexuality and transgenderism by not promoting a single ideological perspective.”

Higgins notes that parental involvement is critical for stopping the ideologically driven school “sexuality indoctrination bill,” as she calls it.

“Parents and all taxpayers who care about what our future culture-makers are being taught in school, and who care how their tax dollars are used, should contact their lawmakers to express their opposition to –– and outrage about –– these bills. And they should contact them repeatedly. The LGBTQ community and their ideological allies beat conservatives in the perseverance and passion war.”

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Higgins faults the combined forces of “incrementalism and cowardice” for parents’ not being involved enough, “which results in the unwillingness of parents to oppose every resource and activity in their children’s schools that espouses and promotes leftist views on the nature and morality of homosexuality –– while [also] censoring dissenting views.”

She added, “Parents are not educating themselves on these issues. They should understand the specious nature of the secular arguments used to defend both homosexuality and the ‘trans’ ideology so that they are able to refute them.”

And despite its seriousness, ideology is merely the tip of the iceberg.

“The mainstreaming and normalization of homosexuality, and more recently transgenderism, has already created a public health crisis affecting us all, especially our young people,” said Michelle Cretella.

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“For this reason alone, further celebration of LGBT identities should be opposed,” she added.

Elizabeth Economou is a former CNBC staff writer and adjunct professor. Follow her on Twitter.