Rand Paul is the quintessential outsider of American politics. Like his ally Ted Cruz, his disdain for the sensibilities of the Washington establishment is matched only by his refusal to play its rules. But the willingness of some members of the conservative establishment to come to Paul’s defense after New Jersey Governor Chris Christie took him to task is a disturbing sign of the crackup of a generations-old Republican consensus on foreign and defense policy. George Will’s brush back of Christie wasn’t surprising, as he has always been a critic of post-9/11 American foreign and defense policy. But Peggy Noonan’s attack on Christie in the Wall Street Journal removes all doubt that some of veteran members of the GOP’s chattering class are headed off the reservation.

The timing of this attack, like Paul ally Rep. Justin Amash’s claim that NSA leaker Edward Snowden is a courageous “whistleblower” and not a traitor, is unfortunate. While Noonan characterizes Christie’s attempt to refocus Americans on the reality of a war still being waged on the United States by Islamist terrorists as “manipulative” and as “an appeal to emotion, not to logic,” it is she who is ignoring the larger context of the debate Paul has launched. While all government power deserves scrutiny, her allusion to a “national security” state—the old line of the hard left that has now been appropriated by some on the right—and Orwell’s Winston Smith is disturbing because it bespeaks not the natural skepticism of the conservative but the knee-jerk isolationism of a libertarian movement that has never cared much for America’s global responsibilities or the need to engage with the world and face our enemies. The isolationist impulse that Paul and Amash are seeking to promote is not a case of “conservatives acting like conservatives,” as Noonan put it, but a disturbing retreat that could, as Christie pointed out, produce awful consequences.

Noonan takes particular issue with Christie’s characterization of the libertarian critique of the NSA as well as drone attacks as “esoteric.” But she’s wrong that in doing so he’s ignoring the concerns that some Americans have with government abuse of power or particular instances in which the NSA may have misbehaved. To the contrary, it is Paul, Amash, and now Noonan who are behaving as if homeland security is an abstract concept that has little relevance to the lives of Americans. What he was trying to do was to refocus the party faithful on a fact that Noonan doesn’t see as particularly relevant. This is, after all, about the measures being employed by the government to defend the United States against an enemy that is, contrary to Barack Obama’s boasting and the complacence of the libertarians, very much still alive and determined to kill as many Americans as they can.

Rather than Christie seeking to manipulate our emotions by references to the families of 9/11 victims, it is Paul and others who have stoked paranoia about “Big Brother” government by posing theoretical arguments about drones killing citizens sitting in Starbucks or misleading Americans into thinking that the spooks are reading all of their emails or listening to all of their calls. Noonan plays the same game herself by trying to unnerve us by alluding to articles about the theoretical ability of super spies to use high-tech software to activate microphones on our phones and record our utterances.

No doubt there are people laboring away at the CIA and the NSA coming up with gadgets that James Bond would envy. But, like the guns that municipalities give police that could, if employed by rogues who run amok, be used to kill innocents, we understand that our security services are primarily focused on dealing with the bad guys. While no system is foolproof, if we cannot trust the existing structure of court jurisdiction and congressional oversight, then it is impossible to construct a rationale for any counter-terror operations or efforts to monitor our enemies.

There are dangers from new technologies and there is always a tension between civil liberties and security in a democracy. But the spirit of resistance to government action that Paul represents is far more lacking in balance than Christie’s apt if impatient dismissal of libertarian efforts to obstruct necessary measures to deal with al-Qaeda.

Noonan is right that polls show a growing number of Americans expressing concerns about the NSA and virtually any expression of government power. Given Obama’s overreach on virtually every issue and his inability to take responsibility for disasters like Benghazi, that is understandable. But what Paul is trying to do is to exploit this natural cynicism to fundamentally alter America’s foreign and defense policy. Noonan tries to spin this as an argument between the grass roots and the elites and the “moneymen” who hang out at the Aspen Institute where Christie spoke. That’s a nasty piece of invective that does little to enlighten the debate. That said, it is possible that a libertarian-fueled paranoia on national security efforts will dominate the GOP’s 2016 presidential race. Yet what the New Jersey governor was exhibiting was a quality that Noonan tends to praise in other circumstances: leadership.

What Republicans need right now is someone who isn’t afraid of confronting Paul and his crowd before they hijack a party that has been a bastion of support for a strong America since the Second World War. Jonah Goldberg is right when he noted today in the Los Angeles Times that the assumption that isolationism is a conservative tradition is incorrect. Isolationism has, as he points out, always been as much, if not more, at home on the left as it has ever been on the right. I, for one, didn’t expect Chris Christie to be one of the few Republicans who would have the guts to call out Paul and the libertarians and attempt to arrest the libertarian tide before it allows the Democrats to become the party with a natural edge on foreign and defense policy. Having done so, he deserves a lot better from those who pose as the conservative movement’s elders than he is currently getting.