And you connect those facts: 2/3 of the population is Hispanic plus highest crime rates... and conclude that most of criminals are from Latin America. That connection should be proved. I'm not saying it's false, I'm just saying I wouldn't reach that conclusion so easily. But in any case, you also said that a lot of the criminals are from Argentina. I doubt it since:
1. Out of the total Latino population of Miami, Argentines are a very small minority.
2. Most Argentines in Miami come from the middle classes (though since the 2001 crisis many lower class immigrants arrived in Miami, sure).