Gender roles probably yes. Religious, cultural not entirely sure. The Ti would start questioning things. However they might not be verbal about their disagreements on such sensitive subjects unless they (others) feel threatened - they feel reluctant to disappoint others/hold disagreements. I think a more important question is whether they are good on bed.
My ISFJ sister is in some ways a traditionalist, but in other ways not. She's a history professor who believes adamantly in Jesus Christ and family life; however, she's also very liberal-leaning and is always ready to smack down some conservatives with a healthy dose of reality. I think, however, that she is very grounded -- thus beating people down with reality with heavy use of some combination Si-Fe-Ti. She's also a rare ISFJ 5, though, and for the longest time I thought she was an ISTJ.
My ISFJ friend/roommate is definitely a traditionalist and proud of it. She defines herself by her experiences and habits. I think we all do that to some extent, but she's actually conscious of how pervasive it is and she likes it that way.
Whether or not that applies to all ISFJs, I couldn't say.