You are correct, after a fashion, but, as Paul Harvey might say, "You forgot to tell us the rest of the story!".
Genuine "national security" consists of protecting, securing and preserving the sovereign, constitutional republic of the United States of America, which was established for the express purpose of guaranteeing the freedom and rights of its citizens to their lives, liberty and property, against all enemies, foreign or domestic.
It DOES NOT consist of using the threat of foreign enemies, however genuine, as a cover for the deconstruction of our Constitution and our Republic, and inevitably as a consequence, the loss of our freedom, rights and property.
Allowing our national leadership, of whatever party, to sally forth abroad and smite our foreign enemies, even destroy them utterly, while simultaneously allowing them to deconstruct and remake our nation into some "new order" and thereby steal the heritage of freedom and individual rights bequeathed to us by our Founding Fathers, THAT is not "national security" - it is "national suicide", at least of the "nation" we're supposed to have.
So, when you say national security is the most important consideration, I agree, but you need to understand that the threat is two-pronged - the "enemies domestic" are just as great a threat as the "enemies foreign".
Yes, I can despise my Canuck imported gubner, leftist senators, even worse congresscritters, but truly realize that they are not the enemy.
It's the folks that empower them.
DO NOT, underestimate how EVIL the average soccer mom is. They're out campaigning for leftists while their husbands are looking for jobs.