Too many false narratives here to deal with. For starters there is more to the immigration problem than getting killed by them. There is the overall burden on our social services, education, healthcare and simply one more burden on the tax payer.
The refugee crisis on our doorstep can be handled by protecting them in their part of the world. It might have been a fairly easy solution if we had not pulled out of Iraq prematurely. What are the Saudis doing to help? 
I always find it interesting that the same people that will raise hell if we spend lives and treasure to go over there to fix their problems are perfectly willing to spend lives and treasure bringing them here to fix their problems. Also, a huge percentage of those women and children were military age men.. There is video footage everywhere showing hoards of these refugees crashing across border outposts. Not a woman in site.
We have 320 million people here already, with plenty of our own problems, how many do you want here,.