???
There were "organized" (I think he means "established") churches in most of the U.S. in the early days, though the First Amendment forbade such an establishment at the Federal level. In fact, until the 1870's, a person standing for election to the state legislature in New Hampshire was required by law to be a Protestant. (I'm pretty sure that law wasn't enacted by Catholics.)
No. I meant organized, apparently I didn't explain myself clearly enough. England could have an establishment church because there was an organized church. Secularism is seen as an official ideology of the US government and gets away with it BECAUSE there is no Church of Secular Humanism. If there were, conservatives could point out that the establishment is endorsing that church. But because its merely an ideology, liberals honestly feel that they have the right to impose their ideology on all public and some private institutions. Unitarianism doesn't count.