I not only live in a border state, but I'm also frequently making deliveries in those border towns where cartel violence is at it's most extreme. I'm a little more alert while there, but I'm also reasonably comfortable with the knowledge that I've not done anything to piss them off.

Except that ISIS/ISIL have killed what, maybe half a dozen US citizens, and none on US soil. While the Cartels kill several dozen a year... on US soil (and many more as a result of their 'product'). Regardless of how reasonably comfortable you are, lots more US citizens get killed by the cartels every year, than are killed by ISIS/ISIL, and no matter how reasonably comfortable you may feel, there is no guarantee they will continue to be reasonably comfortable with your presence.

To be in danger from ISIS/ISIL you will need to travel to Syria or some similar country.

Just looking in from the outside, I'd say US citizens are a greater danger to US citizens than ISIS/ISIL, given the number of firearms associated deaths per year, as compared to the number of US citizens killed by ISIS/ISIL.

But what would I know, I used to live in a tectonically active country, on a fault line, and experience quakes on a regular basis, and that never bothered me.