The last time I visited the Stephen Decatur House in DC, the guide told me that more people come to visit because of Judah Benjamin than Decatur. Benjamin had rented the house during his time in Washington.
He ain't hardly the only one
The South Carolina state constitution was the first govt doc of such stature to specify Jewish religious freedom by name
Also the plantation belt of Mississippi and Alabama and Louisiana had many temples due to mostly Sephardic Jews many of whom owned same plantations as Methodist or Episcopalians
These synagogues are often surfvivimg but unattended given the post bellum diaspora of Jews from the south
There is a book