In reality, the trip was so Trump could attend a high price dinner for big donors. The survivor and victim event was hastily cobbled together so they could meet Trump for a few minutes at the airport where they waited for hours.
As he boarded the plane for Texas, Trump said "We are going to Dallas, we are going to Houston. We are going to have a little fun today."
After the family event, a mother whose child was killed spoke to reporters about her impressions of Trump. He was unresponsive to the parents' suggestions and repeatedly talked about arming teachers instead. "It was like talking to a toddler." Trump also repeatedly talked about how the shooter was dressed and repeatedy called him "wacky."
Trump's lack of empathy is no surprise. He has been widely criticized after visiting or speaking on the telephone with tragedy survivors and victims' family members when he has made other insensitive and inappropriate comments. He also has made similarly tone-deaf remarks while visiting survivors of natural disasters.
Perhaps the most glaring example of his insensitivity was when he visited parents of students killed in yet another school shooting and he was unknowingly photographed holding a card with reminders of sympathetic things to read.
George W. Bush was an incompetent President but at least he was genuinely warm and sympathetic when visiting those touched by tragedy. Trump, however, has all the empathy of a wet rag.