[Verginius Rufus]

Even before the First Amendment was adopted, the original text of the Constitution included the words "no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States" (Article VI).

At that time some states had religious tests but there was too much variety among Protestants in the country as a whole (Catholics and Jews were so few in number that they might have ignored them) for any one religion to be selected as the official religion. Obviously the country has become much more diverse in religious terms since then, not to mention the large number of people who profess no religion. Michael Flynn is nuts if he thinks it would be practical or desirable to try to impose one religion on everyone (presumably some least-common-denominator version of Protestantism).

[Scrambler Bob]

to try to impose one religion on everyone
= = =

Did he try to impose, or

“If we are going to have one nation under God, which we must, we have to have one religion,” Flynn said.

Was he just stating an ideal case, that the nation is best with one religion (which would be Salvation by Christ only).

[Lurking Libertarian]

At that time some states had religious tests but there was too much variety among Protestants in the country as a whole (Catholics and Jews were so few in number that they might have ignored them) for any one religion to be selected as the official religion.

Catholics were the majority in Maryland at the time of the Founding.