When the Obama administration announced yesterday that it is prepared to assist the Nigerian government in efforts to recover the girls kidnapped by the Boko Haram terrorist group, the announcement was greeted with general satisfaction. Far from criticizing the president for sticking his nose into the business of other countries, voices on both the left and the right agreed with the decision to provide Nigeria with a team of experts, including military and law enforcement officers, along with hostage negotiators and psychologists. Indeed, there were not a few prepared to send in the U.S. Marines or fly over drones or do whatever it takes to save the girls or to bring their captors to justice.

I concur with those sentiments. Though the obstacles to a successful foreign intervention in Nigeria may have more to do with the dysfunction of the government in Abuja than in Western reluctance to get involved in an African battle, the case for intervention in Nigeria is easy to make. The defense of human rights has always been an important element in U.S. foreign-policy objectives and the notion of the West standing by and doing nothing while young girls are enslaved and sold with impunity in this manner is intolerable. But while we all join in expressing outrage about Boko Haram’s crimes, it’s fair to ask why Americans or their leaders aren’t similarly exercised about the atrocities being committed against children in Syria. The casualties in the fighting in Syria between the Assad regime and its opponents have reportedly taken the lives of up to 150,000 people, of which at least 11,000 are believed to be children. And yet both the administration and isolationists on both the left and the right tell us it’s none of our business. Does anyone else see this as a demonstration of our lack of honesty or at least consistency in our approach to foreign policy?

The story of the abducted girls of Nigeria seized our attention because of the enormity of this crime, the brazen nature of the criminals who openly brag of their “right” to kidnap and abuse girls, and, as our Michael Rubin aptly pointed out yesterday, the religious motivation behind their crime. It is also a neatly contained sort of tale that allows television news to do what it does best: pull on our heartstrings with a human-interest story. After all, Americans weren’t particularly bothered by Boko Haram’s reign of terror in part of Nigeria that had taken the lives of thousands of people, including children before this week. But since this lurid crime is more easily understood than Boko Haram’s previous depredations or the complexities of the Syrian civil war, everyone, including those who are generally opposed to any sort of U.S. involvement in foreign squabbles, is prepared to use the full power of the Pentagon to save these children.

This tells us a lot about how easily manipulated we are by images but it also ought to make us think twice of the implications of a rising tide of isolationist spirit that has influenced American decision making in recent years. The wars in Afghanistan and Iraq have drained the public of its appetite for foreign adventures, especially in the Middle East.

But let’s say that we accept, even though we shouldn’t, President Obama’s cowardly excuses that he is doing the best he can and that after prevaricating for so long on Syria, there’s nothing that can be done now. Let’s pose another not entirely hypothetical question: What will be the American public’s attitude if, in the coming years after the last American troops have left Afghanistan, the Taliban sweeps to victory and returns to power in Kabul in an orgy not just of murder but of rape in which women and girls are once again the particular objects of their hostility? If Afghan girls are once again being imprisoned in their homes or sold into slavery, will the same people who are today calling out the Marines on behalf of the Nigerian kidnapping victims be crying out for America not to stand by in silence? Don’t bet on it.

Perhaps it is too much to ask people to be consistent. But the isolationists who want no part of the global war being waged on the West by Islamist terrorists need to remember that the consequences of our indifference to their crimes are serious. The U.S. may not be able to solve every problem in the world or be its policeman. Yet neither can we pretend that the horrors perpetrated by these Islamists have nothing to do with us. Anyone expressing outrage about Nigeria should remember that the U.S. has made a conscious decision to ignore crimes just as bad in Syria and have set in motion a train of events that may lead to even worse in Afghanistan.