How did he unwittingly contribute to mixing church and state? He was a big proponent of separation. From wiki:
"Believing with you that religion is a matter which lies solely between Man & his God, that he owes account to none other for his faith or his worship, that the legitimate powers of government reach actions only, & not opinions, I contemplate with sovereign reverence that act of the whole American people which declared that their legislature should "make no law respecting an establishment of religion, or prohibiting the free exercise thereof," thus building a wall of separation between Church & State"
No, I know he was a big proponent of separation; that's why I said "unwittingly". :)
First, here's what I mean by separation of church and state: http://bit.ly/Xy9le (Warning: It's a bit long, but not as long as it looks.)
I suggest finishing that before going to the second link: http://bit.ly/133aMi (Notice especially the first word in the text that starts with the letter p.)
"Believing with you that religion is a matter which lies solely between Man & his God, that he owes account to none other for his faith or his worship, that the legitimate powers of government reach actions only, & not opinions, I contemplate with sovereign reverence that act of the whole American people which declared that their legislature should "make no law respecting an establishment of religion, or prohibiting the free exercise thereof," thus building a wall of separation between Church & State"
http://en.wikipedia.org/wiki/Separation_of_church_and_state#...