This Mormon Colony had previously lost two members murdered by the Cartel. The strongly opposed drug use/distribution and were killed for their convictions.
Darwin would have suggested that they vacate Mexico.
Narcos, largely true, is a wonderful three season presentation available on Netflix, about the war on the Colombian drug cartels. One point that is made early on is that the Mexican cartels made a big mistake in kidnapping, torturing and murdering DEA agent Enrique Camarena. DEA wiped out the killers in retribution and to ensure that the other cartels learned it was very unwise to again attack US agents. For the most part, they left US personnel alone after this; perhaps another lesson is in order.
The strongly opposed drug use/distribution and were killed for their convictions.