the power of the community lies in its diversity
I completely agree with this. Growing up in America, I was taught that diversity of cultures was one of its great strengths (although in practice I didn't experience that diversity much until college since I grew up in a small town almost entirely composed of whites and blacks with few cultural differences).
For most of my life, this was an opinion that I felt was shared by most Americans, or at least given lip service. But lately I've heard this idea challenged by a few prominent thought leaders in America, arguing that diversity leads to disunity and even potential destruction of America's core values, which is an argument I think is very misleading. I find it troubling that more Americans nowadays seem willing to embrace this kind of thinking.
In theory, of course, diversity of cultures and opinion can be bad. Primarily this happens if there is some very basic disagreement about strongly held opinions where the groups involved are not willing to engage in discussion and where the groups involved are not willing to tolerate disagreement.
But I actually think this type of situation is worse when there's only two groups involved. From my own observations, it seems like the larger the number of diverse groups that are in contact with each other on a daily basis, the more likely it is that everyone will learn to tolerate and appreciate other cultures. When I think about it, I suspect this is at least partially just a survival trait when you exist in a society where your culture doesn't completely dominate.
The diversity is richness in all senses. I once traveled to Brazil and I really enjoyed their lifestyle. This is common in every Latin American community, as you say, although there are some who do not agree with this.
For this reason, I would highlight the importance of tolerance and respect. Without these qualities, it is impossible to have a sincere dialogue that can lead us anywhere. In these cases, I prefer to step aside.