I can hear it now from the conservative media.

There he goes again, shaking hands with our enemies.

President Obama today took a moment at Nelson Mandela’s memorial service to shake hands with Cuban president Raul Castro, who was among the 100 or so heads of state and government who traveled to South Africa to honor the life of one of history’s greatest liberators.

Obama took his seat among the dignitaries and shook hands with a number of them. One of them happened to be Castro, the brother of Fidel Castro, the communist dictator who outlasted 10 U.S. presidents — all of whom sought to remove him from power in Cuba. The United States still has a trade embargo in place against Cuba, a nation we still regard as some kind of geopolitical threat — even though the Cold War ended more than two decades ago.

Then the commentators made an important point about Obama’s fleeting gesture of good will toward Castro: It is totally in keeping with the life of the man they all were gathered to honor.

I’ve said it here already, but it bears repeating. Nelson Mandela emerged from imprisonment in February 1990 with his head held high and his hand held out to those who held him captive. He could have fomented violence. He could have returned to freedom an angry man bent on revenge.

Instead, he reached out to his foes and said, in effect, “Let’s build a new nation together. I need you and you need me.”

No one on Earth — except Barack Obama and Raul Castro — know what they said to each other for all of about two seconds. It doesn’t matter. The nations still are at odds over a whole host of issues. The two men weren’t present in that massive Soweto stadium to argue with each other. They were there to honor a great man’s memory and his glorious life of reconciliation.