Good question. I think I was brought up in different cultures all at once so I wouldn't know. I was born in one country, moved and raised in another, but a lot of the culture from my country of origin was still present as my family raised me. I also live in an area that's full of people from other cultures so I see a lot of that, too (different race, religious background, religious customs in relation to country of origin, etc.).
Maybe if I was only exposed to one culture, my beliefs would be different. Then again, my beliefs are deeply rooted in my curiosity and understanding of what I don't know (I've been told I'm the only one in my family who's like this) so maybe I would end up with the same beliefs, but through a different method.