They're an ethnic group belonging to the Cushitic peoples inhabiting the Horn of Africa. They have a long list of tactics to steal America's benefits, form gangs, create violent criminal acts, ......stealing hundreds of millions in American welfare money that they are literally shipping back to Africa stuffed in suitcases. Worse, the cash is going to fund the various Islamist terror armies there.
I think it was Obama that decided to import massive numbers of these third worlders.