In a general way, I agree with Doug Morris. Christianity is embedded in our culture of (coercive) altruism, a cultural force that sanctions endless American aggressive war making around the world.
We were all raised on the doctrine of American imperial power--American "greatness"--as virtuous, despite literally millions of helpless foreign individuals ground to dust in the wake of our "fighting for freedom." But that doctrine is a perfect example of the viciousness of collectivism, justified by lies and false ideals. On the right, this collectivst doctrine of "freedom fighting" was promoted successfully by Bill Buckley, who admitted individual freedom in the USA could not exist along side the garrison state necessary to advance his agenda.
The essential problem with the war making is that it violates individual rights, of Americans sacrficed to the various crusades; and of helpless foreign people who are wiped out by the millions. Objectivism is a philosophy that defends the moral value of the life of every individual. But some people on this site who believe themselves to be objectivists support the wars and killing. Sometimes they admit to too much carnage in this or that instance, but fundamentally, they are in favor of US aggressive wars as somehow defending individual rights through literal aggression.
In Vietnam alone, one of many such murderous wars of liberation, I have read estimates of from two millions to six millions murdered by incessant carpet bombing, joined with other means of killing. And of course, nearly sixty thousand American young men, who were enslaved to go to war, were murdered; plus hundreds of thouands maimed, crippled and traumatized. In Iraq, I have read estimates of a couple million killed due to our military invasion--which number may include civilian deaths attributed to terrorist murders after Saddam's fall from power. The war between Iraq and Iran, that our government actively promoted and supported with tax dollars, in a big way, killed at least two million; Saddam was "our" man. In the Korean war, American bombings killed something like 1/3 or more of the entire population of the North. Vietnam, North Korea, Iran, Iraq, Libya, Panama...none of these countries posed a military threat to Americans in the United States.
Defenders of the American war state often respond, or so it has seemed, with vitriolic accusations about "appeasing evil" or dishonest "exaggerated" numbers. It is not the responsibility of Americans, through their government, to roam the globe in search of monsters to destroy, paraphasing John Adams. If someone wants to fight ISIS or send money to support Israel, get a plane ticket or wire your own money. Leave others to make their own decisions. Regarding the issue of properly estimating the numbers of victims of various American invasions, it is not relevant to understanding whether or not they were, in fact, victims.
What is key in this debate is the proper meaning of aggression versus (self) defense. War hawks necessarily hijack those concepts to make American aggressive wars, and the carnage they cause, appear virtuous. These aggressive wars are never fought in behalf of individual freedom, but rather in support of Pax Americana--the world at peace on terms set by American war politicans and philospher kings. But again, American "peace" has nothing to do with defending individual rights, of Americans or anyone else. Saddam Hussein and Gaddafi were vassals of the American state, as was Noriega in Panama and the Shaw of Iran (who defended his tyranny through torture and murders carried out by his secret police, SAVAK, that in turn had been trained by loveable CIA puppies.)
The "argument stopper" used by war hawks today is 911. But 911 was an inside job, executed by the Bush cabal and the deep "national security" state. I don't know exactly what happened, but I do know what did not happen. Anyone who chooses to be honest and brave can easily discover absurdities in the official story. Dedicated war promoters refuse to think actively about 911, I think, because they sense they're on thin ice intellectually and emotionally. (Changing one's world view is emotionally upsetting.)
It is sad to encounter well meaning followers of Ayn Rand, who defend American war making as virtuous and just. The national war state is the most vicious of all U.S. government depredations, at home and abroad. But war-addicted objectivists will not accept facts that contradict the "virtue" of American wars, which is an example of the philosophical error of the primacy of mind over reality. Similarly, those who denounce reasoned refutations of the 911 fairy tale as "conspiracy theory", also implicitly assume that the "the correct attitude" about "conspiracy theory" nullifies facts they choose not to examine. Leonard Peikoff wrote about why the primacy of facts is fundamental to reason, and the primacy of mind is fundamental to irrationalism.