I totally agree that the Nevada Sanders delegates were out of order, and that there has been online comments that are uncalled for. I am assuming the latter were actually from Sanders supporters and not confederates.
My experience has been totally opposite of those in Nevada. Our local organizers continually warn against any attacks against Clinton, even backing away from criticizing her policies. Along with 15,000 others, I attended the last Portland rally, and there were no anti-Clinton signs. And from what I read, no anti-Clinton focus in at the Springfield rally. The RG wrote there was a "...thinly veiled shot at Clinton."
Maybe as a Sanders supporter I am more sensitive to the RG using an idiom like "how on Earth?" as a rhetorical question to make a point. But the use of "how on Earth?" instead of simply "how can he expect to run a country" adds an emotional component, as if the author was baiting Sanders' supporters to prove his or her point with an angry response.
Not from me.