[loveliberty2]

". . . Jefferson’s wall was constructed in the service of the free exercise of religion. Use of the metaphor to restrict religious exercise (e.g., to disallow a citizen’s religious expression in the public square) conflicts with the very principle Jefferson hoped his metaphor would advance. Third, Jefferson concluded his presidential missive with a prayer, reciprocating his Baptist correspondents’ "kind prayers for the protection & blessing of the common father and creator of man." Ironically, some strict separationists today contend that such solemn words in a presidential address violate a constitutional "wall of separation."

What a precise commentary!

The Radical Left in America, in order to advance its agenda, conveniently overlooks facts. An exhaustive reading of Jefferson's voluminous writings, as well as close examination of his life and deeds, make it clear he would be shocked and dismayed by the perversion of this phrase from his letter to the Baptists.

[GSlob]

Why, absolutely wrong commentary. Jefferson's wall is there to protect ME from YOUR religion if I do not happen to belong to it and find it disagreeable, by removing the state out of the picture. The same wall protects your religion from my presence. If I visit a church [as an architectural monument, for example], I do it in the hours posted by that church as being open to such visitors, i.e. I'd be present with permission only, and not otherwise. The same approach ought to work in the opposite direction as well - hence the wall.

[Exton1]

It also must be pointed out that Jefferson wrote the Declaration of Independence, and not the Constitution.
So it is irrelevant if he thought there was a wall or not, If it is not in the US Constitution, then it goes back to the people. People forget that MANY minds worked on the US Constitution and it is there agreements that survive.

[Gondring]

Then again, it wasn't only Jefferson who commented on this topic. Madison viewed it as being quite important, too.