Indeed, Miami Native here. (Live in Bay Area Now) This article comes to the conclusion it was looking for that is in fact false and not rooted in reality. Brownsville/Overtown/Liberty city were not intentionally left as rundown ganglands there have been attempts to clean them up but all have failed. Also Little Hati is downright dangerous to enter. [1] And of course Little Havana is still Cuban, it's well maintained generally safe and all that the Cubans who had to leave their country have left (Besides Hialeah). Also Lets not forget that ~70% of Miami is Cuban and they really value their heritage (my wife is Cuban)

[1]https://www.youtube.com/watch?v=KqdObNwHyFI