30,000 Haitian immigrants doesn't do anything on its own to prevent you from living your own life or practice your own culture.
I'm all for migration to be natural and market-driven, and I think part of the issue with some of these huge pockets of immigration is that State authorities are putting a finger on the map and saying "you go here"...
But at the same time, as many in this thread have declared to be a "good thing", 1st generation immigrant cultures tend to want to self-associate, so it's not surprising that this happens.
"White genocide" is the dumbest idea every. European colonists and later Americans 99% of the Native American population over the course of 200 years... Nothing like that is happening to "white" people.