A Pattern in Terror - Second Generation, Homegrown

Peter Bergen wrote for CNN about homegrown terror: 

Because 9/11 was carried out by 19 foreign-born Arab hijackers, many assume that all terrorists who attack the West are foreigners.

This explains, in part, why Donald Trump is now President. He advocated a seemingly commonsensical approach to the terrorism problem during his presidential campaign, which was to ban Muslim immigration, including refugees.

But, in reality, every lethal terrorist attack in the United States since 9/11 has been carried out by an American citizen or a legal permanent resident.

That's what makes the news that the terrorist who carried out the Manchester attack, Salman Abedi -- the son of Libyan migrants who was born and grew up in the United Kingdom -- unsurprising.