On June 17, 2015 a white supremacist by the name of Dylann Roof massacred nine black worshippers in an African-American church in Charleston, SC. Far from condemning Dylann Roof, or even condemning his ideology, Obama praised the forgiveness shown towards Roof by relatives of the victims.

"The alleged killer could not imagine how the city of Charleston, under the good and wise leadership of Mayor Riley – how the state of South Carolina, how the United States of America would respond – not merely with revulsion at his evil act, but with big-hearted generosity and, more importantly, with a thoughtful introspection and self-examination that we so rarely see in public life."

Trump is being savaged for not condemning white supremacists forcefully enough. Yet Obama was admired for speaking of forgiveness and introspection over the same issue. Can you imagine what would be said if Trump had used Obama's same approach?