Second, while the motivations behind these shootings may not yet be fully known, there are indications that the El Paso shooting follows a dangerous trend: troubled individuals who embrace racist ideologies and see themselves obligated to act violently to preserve white supremacy. Like the followers of ISIS and other foreign terrorist organizations, these individuals may act alone, but they’ve been radicalized by white nationalist websites that proliferate on the internet. That means that both law enforcement agencies and internet platforms need to come up with better strategies to reduce the influence of these hate groups.

But just as important, all of us have to send a clarion call and behave with the values of tolerance and diversity that should be the hallmark of our democracy. We should soundly reject language coming out of the mouths of any of our leaders that feeds a climate of fear and hatred or normalizes racist sentiments; leaders who demonize those who don’t look like us, or suggest that other people, including immigrants, threaten our way of life, or refer to other people as sub-human, or imply that America belongs to just one certain type of people. Such language isn’t new – it’s been at the root of most human tragedy throughout history, here in America and around the world. It is at the root of slavery and Jim Crow, the Holocaust, the genocide in Rwanda and ethnic cleansing in the Balkans. It has no place in our politics and our public life. And it’s time for the overwhelming majority of Americans of goodwill, of every race and faith and political party, to say as much – clearly and unequivocally.