This country is not ready for an openly gay man to be POTUS. Maybe 40 years from now, but not in 2020.
No matter how many attempt to normalize homosexuality, it is aberrant behavior for the majority of people in the USA. And as our population becomes more Hispanic, they believe that to be true in higher numbers.
And studies show 2nd generation Hispanics are overwhelmingly conservative, so there is that.
I just do not see them advancing beyond where they are. To be able to say an openly gay man ran for president might just be the best they ever achieve.