This kind of stuff happens every day, but usualy on a MUCH bigger scale, all around the world and has happened for 1000s of years, go read some history books.

You only noticing it as the news is showing it.

These people KNOW the risks of going there, the risks is why the pay is so high, and thats why they go, they dont HAVE to be there.
If there was not risks like this the pay would be far lower and the people wouldnt bother going...

If we talking people in the military, its part of risks of the job and always has been, if you invade a country youl find a lot of people dont want you there and will do anything to get you out.

The end.