Humanists are staunch supporters of freedom of religion, belief, and conscience, as laid out in both the U.S. Constitution and the Universal Declaration of Human Rights. These rights protect the freedom of religious belief equally with the freedom of nonreligious belief, the freedom of religion equally with the freedom from religion. Secular humanists would actually oppose advocacy of their worldview by schools or the government because that would violate the neutrality of a secular society, and the rights of religious believers. Secular humanists believe that a healthy society supports a variety of worldviews, just as it supports a variety of political parties. We also believe that religious and philosophical views should be every bit as open to debate and discussion as political beliefs.
Secular humanism is the official religion of the public education system.
Secular humanists would surely be proud to accept sole credit for schools teaching, say, science, sex education, and objective history. But we must share the credit with millions of Christians, Jews, and others who value good education. Related myths are that secular humanism is the official religion of the government, the media, the universities, and anyone else who refuses to support a favorite dogma. That's a good tactic if you want to create a persecution complex, but it disregards the fact that neutrality toward different worldviews is the best protection from persecution in our democratic society. Secular humanists don't exist.