As a non-hispanic gringo who has been living in Mexico off and on for the past 30 years, I can tell you that most of the violence is limited to the border area with USA and in large cities. The violence is between rival drug gangs, police and military, and rarely involves members of the public. The Mexican countryside and resort areas are generally peaceful and safe. I have traveled, wheeled and camped all over Mexico in my jeeps and never had a problem. Once you understand the culture and which places to avoid, you are reasonably safe. Just as in many US cities, you avoid certain neighborhoods and locales. Always travel in a group (as jeepers generally do anyway). My personal experience has been that 99% of Mexicans are really nice, friendly, and very hospitable, even in the current situation.
Mexico offers an incredible amount of wheeling opportunities without all the hassles of land use regulations and closure issues that you have stateside. If you do travel into Mexico, plan your route carefully and hook up with the local jeep clubs.
2008 Rubicon 2 door 6.5" lift, 37" Swampers, RR narrow tube fenders, reinforced axles, long travel shocks, Rubicrawler 10.88:1, Allied Rockathon Beadlocks, AEV snorkel, Warn winch, purejeep rocker guard, stubby tire carrier, plus a ton of other mods.