As someone posted on another thread, El Paso butts right up to Juarez, Mexico.
It’s possible that only a tiny percentage of the shoppers were even American citizens.
The shooter was using a .30 caliber semi-automatic rifle against crowds of people in a confined area. It would be quite easy to rack up that kind of carnage in just a couple of minutes.
Reports say that 3,000 shoppers in Walmart OMG there is NO WAY I would ever go into a store that damn crowded where the hell do all these people park?..