The correct answer to this open question is the following.
The two ways in which some cultural views that exist, may affect
a relationship negatively are the following.
1.- When the cultural difference includes a religious belief that is supported by one culture but not for the other.
2.- When the cultural difference includes a nationalistic idea that is not shared by the other culture.
That is why it is so important that we can be respectful and tolerant of other people that do not think the way we think. Nobody says that we are right and they are wrong and vice versa. That is why people and cultures are so diverse.
And if we are open and have criteria, we could learn many things from other cultures, nationalities, and races. They have so much to share as well as we have so much to share too.
Again, it is a matter of respect and tolerance.