The internet has allowed people to create their own communities and the secular boom is probably related to people being able to find that they are not alone in their doubts about religious authorities, the existence of god, or their disdain for dogma. Latinos are not an exception to this and the internet has allowed us to find each other in different parts of the country and the world.
This is the case of the Secular Latino Alliance started by Sal Villareal. It is a website and Facebook group that allows Latinos who have left religion (or were never religious) to find each other, share experiences, and realize we are not alone.
If you know any atheist or otherwise nonreligious Latinos, or if you are one and you’re looking for a friendly place to chat exchange ideas, head over there.
Edit: Here’s a video of the group’s founders/admins in Aron Ra’s show the Ra-Men.