Donald Trump is incapable of empathizing with other people. His latest statement against the Khan family, which Jeb Bush called disrespectful, are the the latest in a line that show his lack of empathy. This includes mocking a reporter with a disability and making fun of a female reporter for asking him a tough question.
Yes, Donald Trump may not be capable of the level of empathy that is needed to be an effective political leader. Many of Donald Trump's statements show that he is not capable of empathy. It is not simply the way that he treats the Khan family that is evidence of this fact.
Trump is a complex individual. Although he is often brash and offensive, he is also capable of empathy. He has a great deal of empathy for people who follow the law and are being victimized in various ways by those who do not obey laws. Although it is likely he will not show empathy to various individuals and groups, he is quite capable of empathy.
Donald Trump is not incapable of empathy. Yes, Trump often makes insensitive and bombastic comments that offend many. However, Trump is always responding to an attack when making these rude remarks about others. He has never started a fight with an innocent person. All of these incidents where Trump says something insulting have occurred after the offended subject first attacked Trump.