A certain Finn who was a hunter by trade is used as an example of why a single rifleman is important in my firearms course.
Circumstances change, but the rifleman remains, and his 500+ kill record still stands.
On the other hand, I wonder if possibly Russia, China and the USA may unite to deal with their common threat posed by Islam?
Larry Niven and Jerry Pournel had a very interesting set of stories based in a world the United States and the USSR combined into an alliance. If we had managed to keep the communists out of Russia they would be a strong ally or at least a close friend. Our two countries aren’t so different and we would be in a much better position to combat threats whether they be Islam or China.