I can readily believe this. When I lived in Florida, the Haitians who came over on rickety boats were reputedly eager to work and better themselves. I ran into a couple of them working in my local market, really pleasant, helpful people.
And the local homies on welfare hate them because of that.
Yes, I know the Haitian gangs are the most merciless, but I cannot condemn a whole group because of the bad guys.
But those Haitian gang members are highly motivated to make money!
The homies think they are really sticking it to whitey by living in housing projects and on welfare and foodstamps. Little do they realize that is exactly where the KKK and DNC want them.
If you have a bit of free time, pick up Tom Wolfe's Back to Blood, published in 2012.
Yes, it's a work of fiction but Wolfe really does capture the tension that exists between ethnic groups in Dade County, Florida. Although this recent effort by Wolfe wasn't popular (perhaps because it's very un-PC), I found the story compelling and it supports your analysis.