I am no fan of Donald Trump and find most of what he says dispicable, and agree with him on very little.  However I think Lawrence mis-characterizes Trump in at least two areas

1/  The wall with Mexico is not to keep out immigrants, but illegal migrants.  This is a very big difference, as immigrants would receive proper legal approval to move to the US prior to arriving.  Illegal migrants simply cross the border and live illegally in the US.  Neglecting this distinction mis-characterizes both Trump and his position, regardless of the merits of either.  

2/ Did Donald Trump call for the death penalty for the accused in the Central Park rape because or race, or did the accused just happen to be of minority race?  We cannot know what Trump would have done so many years ago had the accused not been of minority race, or if he knew the Police wrongly accused those boys at the time .  

But assuming the worst, even for Donald Trump, is not at all helpful to improve race relations.