Why would the U. S. Government be worried about French and Spanish Louisianians participating in American self-government?

because they are foreign countries and the americans would rather gain trust in them before they make deals with them.

Explanation:

both believe in many god or polytheism

both built temples that they worshiped in both civilization's god were humanoid

both groups made religion a large portion of their lives

both believe in one religion throughout

the dead were buried with items for the afterlife