I'm sure there will be argument over the semantics and specifics but that's not important to the points I want to make and which is implied in this piece:
1) If you continually brand some group of people as some derogatory thing if all they want to do is talk about an issue, it's only a matter of time before they stop listening to you.
2) If your only response to dissent to your world view is to brand the dissenter some derogatory term and then turn inward to others of your own mind, it's only a matter of time before you lose influence outside your inner circle.
3) You can't hope to influence others behaviour by labelling them something you yourself would hate to be labelled. The label may have no meaningful effect on them, other than to reject your statement entirely, thus actually diminishing your effect on them.
The trouble with all these things is people cherry pick statements, occurrences, inferences and associations to match their own narrative. This includes the media, popular groups and individuals themselves, despite the double standards this might expose when their favoured candidate/group does the exact same thing (of has done it previously).
Only through actually communicating with others of differing viewpoints in somewhat of a reasoned fashion can any effective influence hope to be achieved.
Point 16 brings up especially good angle on this so skip to that if you don't read the rest.
The conclusion is one I support strongly too - stop fear-mongering, stop labelling dissenters racist, stop playing identity politics.
As a side note it's happening here in the UK over Brexit. Despite unemployment going down, retail sales up faster than any time in the last 15 years, the economy growing etc etc it's all framed in the context of 'yeah but everything is going to go to shit and you're all racists for not wanting free movement'.
Sure, be suspicious/cautions/prepared of/for the future but don't actively sabotage it before it's happened, or all you've done is create a self-fulfilling prophecy.