Like many of the sentiments expressed here.  The author's inlaws' efforts for dialogue "doomed to fail"?  But it's worse than that. Their efforts merely bolster the "other side."  Bullies LOVE attention; the RELISH the opportunity to strut their stuff. 

The temptation is sometimes strong to respond to people--either peacefully or forcefully, but should be resisted.  Believe the author's correct: ... there is no rational engagement possible here ... most people can't actually be reasoned with." ("Most people"? Many people, is likely more accurate.)

Which brings me to readers' heated comments on another story: Trump's NAFTA pull-out threat. Sez one poster, "why is nobody calling him out? C'mon media, Canada, Mexico, fire back."  Another: "...it is time the Trudeau government ...draws a line in the sand. We will accept this but no further. Period. Show Trump we have some back bone."

Resist all urge to respond--except at the negotiating table.