I would not go that far. However, Democratic polices are partially driving the move.
Earthquake in August is also driving them out of Haiti to seek a better life. Because of the earthquake many will claim refugee status. However the journey to America could take as much as two years. Poverty, and poor conditions with no hope of work. America is the goal.
They have been told all they have to do is make it to America. The Democrats have opened the boarder and the Haitian population is highly organized in its movement through Mexico. It is no surprise this group showed up in the numbers they did. They have been tracked for some time. Before they would have been told to stay in Mexico, now they can claim refugee status even though they most likely were not in Haiti during the last earthquake.
It's a mess at the boarder.