"Trump’s solid basis of support is relatively homogeneous. It is fed up with foreigners, with foreign entanglements and with the political class as a whole. Its worst temptation is dehumanization — reducing migrants, refugees and Muslims to threatening types."

As to the majority of the Trump supporters I know (actually all of them), the only thing that applies to them in Gerson's statement above is:  ""Trump’s solid basis of support is relatively homogeneous. It is fed up with ... the political class as a whole."  The other stuff is true to a limited extent but until democrats and anti-Trump republicans understand the true appeal of Trump, the headline is correct, "Trump’s Critics are Playing into his Hand".