That with

Now in his mid-30s, Mr. Kim inherited in 2011 the leadership of a people who didn’t know anything about him until three years before he took power, and perhaps were disgruntled by another hereditary succession.

To maintain power and promote stability, Mr. Kim and his strategists have worked to obtain the modern equivalent of a hedgehog’s quills — nuclear weapons — and the simple narrative that with this “treasured sword,” and the clever wits of his atomic scientists, Mr. Kim will protect his country from imminent destruction by the “marauding” United States.

Is the second sentence grammatical?