You should start a new thread for that question as Inglewood and Temecula are far from each other in both distance and crime rates. These are polar opposites and your comment on Temecula’s lack conservatism while contemplating Inglewood as an option has me worried you are not from these parts.
To answer your question about Inglewood, you must first define “diverse.”
In 2000 it was 47% African American and 46% Hispanic, according to wikipedia it has been shifting more towards Hispanics in recent years. In some circles that would be considered incredibly diverse, but in other circles having two races comprise almost all of it’s inhabitants would be seen as not very diverse. I guess it all depends on what you define diversity as. If you are African American or Hispanic it might seem fine but if you were the only Asian person there, you might not feel the same level of “diversity.”
When relocating, you should look into all sorts of data, Inglewood has some of the highest crime rates in California, some of the lowest home ownership rates and college education rates. Like all places, there are good and bad places to live in any city so my suggestion is to visit the area both day and night before relocating there.
Now on the issue of criminal street gangs, there is less diversity as the bloods seem to have more gangs, there are 9 blood gangs, 5 crip gangs and 7 hispanic gangs. For a town of a little more than 100k, I’d say that’s too many blood gangs for the overall balance of power.