Citizens who side with Islamists should not lose their citizenship. I think a better idea is to deport them to IS.. one piece at a time.
Well W.W.II was a little more efficient. Not one piece at a time we did it to enemy civilians hundreds of pieces at a time. Carpet bombing. Sometimes the pieces were cinders. I recall the whole neighborhood cheering as the local radio station broadcast the sound of falling bombs; namely, Little Boy and Fat Man.
War is not the World Cup.
It was a generation of Americans who stubbornly held fast to the idea of winning a war.
Mexicorruption has long expressed this attitude vis-a-vis the United States:
How do you eat an elephant? One bite at a time.