I'd guess that if the acadians were Jewish, we'd have heard about it. There were Jewish traders in Louisiana in the late 17th early 18th century though. Enough of them that the King of France had them expelled. I understand the edict wasn't really enforced.
THE "BLACK CODE" OF LOUISIANA March, 1724
Louis, by the Grace of God, King of France and of Navarre, to all present and to come, greeting. The Directors of the Company of the Indies having represented to us that the Province and colony of Louisiana is considerably established, by a large number of our subjects, who use slaves for the cultivation of the lands. ...
ARTICLE I orders that the edict of 1615 be applied to Louisiana, and that all Jews who may have established their religion there be expelled within three months, under penalty of confiscation of body and property.
Continued at link, deals largely with slavery.
Thanks! Interesting. My family was here before the La Purchase so I guess we may really be French. Of course the Spanish owned us for a while so who knows.