This is why missionaries, when traveling to other cultures, undergo, and have to work through, not just jet-lag, but also cultural shock! When migrant groups move to America, those cultures do not just disappear, or assimilate, as much as society, or social media would have you believe. They remain, though inevitably adapt to dwelling in a different environment. But as the cultural, perceptional differences persist, so does the comfort preferences.
Because America was considered the "melting pot" for so long, we assume that our cultures have all just melted and blended together. To some extent they have influenced one another, but they still remain just as distinct as the peoples who hold them, and most often, don't want to give them up, because that would mean giving up who they are. And that involves a lot of pride and feelings of emotional attachment. People do not want to give that up.
So what is the solution to the problem? Should we all take on the characteristics of the majority group in the area in which we live, so we can all attend church together? Or should we remain true to our identity (and culture is a major part of your identity!) and seek to serve one another in love, and through these ministry opportunities, form relationships, and join in worshiping our King together.