Can't speak for the US specifically but it is well known fact that people prefer the company of their own kind. Basic heard mentality. You look like me, therefore you are like me, therefore you think like me, therefore I'm better off with you rather than that weird looking guy over there.
I still don't understand very well this latino thing in the US. Here in Brazil if we call someone latino as a race it's for someone who kinda looks like a native American, an indian from the continent, principally from the Spanish speaking countries. We rarely do it though, it's generally said as a place of birth.
I see so many people that are considered white here being called latinos there, I get confused. If your skin color isn't white here, then you're considered something else (indian, black, Asian and so on). It's way simpler this way.
There is a racial divide between Latinos and Whites most likely because of Donald Trump with the whole illegal immigration issue in the USA and stuff.
I'm white but I'm not American, I'm British and there is literally not a latino population here in the UK at all, so I don't experience with them everyday. However, I have been to several states in the USA and the reason why I would not date a Latino woman is because the ones I have came across appeared very aggressive, rude, trashy and they often lean on to the "thug life" crap. I have yet to meet a nice one. I also have noticed most of them put on weight as they get older which is also highly unappealing to me. But that doesn't matter, because a lot of Latino people actually really hate White people and vice-versa.
Therefore, it's better for both groups to stick wth their own race and live their own lives without starting a race war.
I have dated a Latino girl in my past, and it ended largely because of religious differences. She basically told me the only way i could stay with her is to become catholic. Not going to happen, not changing the core of who i am to suite a girl i am dating.
It's because of racial conflictions and culture, maybe. I'm white and I go to a high school that has a majority latino pupil ratio. Most Latinos from my experience have been pretty grim.
Every day I get harassed because I am one of the only few white pupils in the school. I am literally the only white boy in all of my six classes. They call me "gringo" and "pasty cracker" hurtfully and hit me on the back of my head when we are in class. Some whisper in Spanish behind me about me as I always hear my name in the conversation. Even the girls would call me disparaging terms, assault me, give me dirty looks etc. These girls tend to lean on to the "chola" style.
These are the reasons why I would probably not date a Latina or associate with Latinos as a whole. Now I feel bad for saying all that, because I'm sure not all Latinos are like this, but I have never had the chance to get along with at least one of them because they often choose to segregate themselves from White people in general.
I think things would be much easier for me if I just date my own race, while Latinos can do the same and we'll all be fine.