I have heard of the horrific abuses that thugs in Mexico visit upon immigrants from the south. It’s basically open season on them - robbery, rape, and murder because Mexico does not protect them.
Mexico deports more immigrants back to Central America than does the US>
http://www.breitbart.com/national-security/2015/06/18/mexico-deports-more-immigrants-back-to-central-america-than-the-u-s-does/