There are both pros and cons of haveing a diverse society, but the cons are quite minuscu in my oipinion.
Firstly having a diverse society means that different people with different points of view can pitch into a a conversation with there oipinions on the matter, bring out a dimension in something that was completly unknowwn to the other people.
A diverse group of people would probably be more acepting of other people as well.
However, somtimes people might not trust other people simply because they are different, often times people want to be surrounded by people that are the same as them, and people often don't like