I am Jewish (although not super religious) and never thought of straigtening my hair because of it. I don't even relate it to my hair at all. If I want it straight I make it straight. If I want to wear it curly I wear it curly. It totally has nothing to do with being Jewish as far as I am concerned. Although, I am sure for some people it does...
3A/3B (not really sure)/No Shampoo/Conditioner Only/Honey/Aussie Volumizer+condish/Biolage Gel/Plop/Diffuse/Spritz of Bed Head Maxxed Out