Christian Groups: Biblical Armageddon Must Be Taught Alongside Global Warming

What part of the First Amendment don't these Christian groups understand?
We are a secular nation, not a sectarian nation. I know that most of these Christian's think the Amendment is only one way, government can't interfere with religion, but THEIR religion can and must be part of government.

Teach, pray, practice your faith all you want in your homes, parochial schools, churches, synagogues, mosques, temples, kivas, and sweat lodges. But leave the public system neutral, thus without religious elements all together so there is no favoritism to one faith or another and for those of no faith (which is not favoritism). If it is absent, then it can not be objectionable to any one particular faith or no faith families.

You have plenty of time to teach your children your faith and why it contradicts the science that is taught in the schools. Public schools need not be the ones to conduct the argument of the differences between science and religion. These Christian groups would not want government requiring they teach the science they object to in their religious services? Then they should not want their religion required to be taught in the public schools.