I don't believe those people were "the left". I don't think the entire state has that many Democrats, so part of them had to be fed up "center"....
Remember, Jason Chaffetz, the biggest coward in DC and SLC, rode the "anger" of the Tea Party and 200 people in town halls in 2010 to power. And to see it come back to him 5x is an eye opener. And, he really doesn't know how deep the anger is. But, now he has to tell his wife that he might be losing his job in 20 months, if he misreads the sentiment.
I had an exchange with my congressman on this very subject. He was under the impression that the "protests" are "democrats imploding". He is in denial, while I told him he might want to visit his District.
Chaffetz already go told to withdraw 622 from his fellow Congressmen. They will not stand for him to keep leading them into losing positions. Even if he retains his seat, he can cripple others if he continues.
I didn't say they were all left, but many were and that is what it is seen as by a majority of people. I want to get some of these guys out of office and sorry, that's not going to do it. This will drive people farther toward Trump. You can be angry and act civil. I would like to see a few more democrats get in office to even this out but actions like this, the constant protests, and the doubling down the left is doing is just driving people into Trumps arms even more and he's going to have coat-tails. Getting these people out of office is more important than making a point. Civil anger and letting yourself be heard is what will accomplish something. Yelling a guy down just hurts the message and branding of it and makes it harder to get people back in congress who will reject this crap. Some hostility is okay, when it starts to look like one of the many protests around the country it cheapens the message and hurts our cause IMO.