Today we heard of a shooting at the Holocaust Museum in Washington, D.C. that appears to be the work of a single gunman, whom authorities believe to be a man in his late 80s by the name of James Von Brunn. If this is the suspect in custody, he is actually a World War II veteran and vocal member of the Holy Western Empire, which at this point, seems to be a white supremacy group.

It is sad to see people resorting to violence to settle their differences. And we have to be aware that we still need to be vigilant in our efforts to protect ourselves — despite the feeling of some Americans that security measures in this country have become too intrusive. It’s important to support our men and women in uniform, who at both the local and national levels, do a terrific job of keeping our country safe.

What this man did was an act of terrorism — domestic terrorism.

But the big question is: What’s the psychological profile of this shooter? If you look at some of the psychological profiles of past shooters, they are all different in their own way. However, there always seem to be some common themes.

Most of these people are angry at someone or a group of people, and share a psychotic belief that their misfortunes are predicated on the actions of those they hate.

Usually they are loners — they feel rejected by others or by society as a whole.

For some, substance abuse and depression are common themes, but even knowing these common themes, it is almost impossible to differentiate between who will just withdraw from society and who has the potential to snap and hurt innocent people.

I pray for those hurt in this tragedy and hope that we are able to create systems that could perhaps better identify high-risk people and prevent future tragedies from occurring.

In some cultures, as soon as a baby is born, the father whispers a message into the child’s ears. I’ve seen it done with some of the babies I’ve delivered, and while I never ask what was said, I’m sure it’s a massage of hope and love.

I don’t know if my father did anything like that when I was born, but he did make sure to tell me early on in my life, that America was the land of hope and opportunity. And I believe that it was then, and it always will be.

I know that for many people right now this seems like a difficult concept to believe in, but for some of us, today’s troubles are the challenges that will continue to make our future great.

The stresses that most Americans are experiencing right now are overwhelming. I see it in my own practice — unfortunately these days it seems even the joy of a new baby is sometimes overshadowed by the financial strain of a growing family.  I tell some of my patients that are dealing with these feelings of anxiety to reflect on their past and see how America has always been there for them.

It’s human nature to survive, and throughout history, we have seen people survive through much worse conditions than we are in today. This isn’t the first time a nation has faced hardship, and history has shown us that even at the lowest points, through two world wars, depressions, the Holocaust, famine and terrorism, just to name a few, the human spirit has prevailed. And today, we as Americans will not surrender.

As a kid, I grew up in a communist dictatorship where our survival was predicated on dealing with a black market economy. My father came to America with just a coat and $150 in his pocket. America made him a new man and allowed him to work hard and build up his family. He stopped thinking about the worst-case scenario, and focused on making an honest living.

America will never fail — just look back in our history. The world has seen many terrible things. But rather than surrendering to your worries about the present, think of the past and remember the words of Winston Churchill, who in his most desperate moments, rallied those around him, by saying “We will fight in the hills, we will never surrender.”