The Latinos that are here legally is completely different. They should vote however their heart desires. The left has supported open borders as a method to get votes. There is no sensible reason to import low educated low skill workers into a country that already has plenty of those.
Also, the left has desires on flipping Texas. They believe the large Latino population is the start and then letting as many illegals in the country as possible is a method to turn it completely. This is accomplished either by letter illegals vote, which they do, or hoping their next generation votes Democrat.