Mexico is almost as corrupt as Pakistan. What are the chances terrorists
operating in Mexico would even come to the attention of Mexican authorities?
If they did become known to Mexican police, for example, pretty darn likely
the terrorists could make a charitable donation to the policeman's
retirement fund and come north to kill gringos as if nothing happened.

There are reasons why Muslim terrorists would likely come over the northern
border but coming over the Mexican border seems as difficult as falling out
of bed.

--

Scott