Coming at this from someone who lives in a state that, like Tennessee, has been essentially a one-party state for years, and setting aside the obvious racism displayed by the TN House, it's also an example of how these legislatures in the south aren't used to actually having to deal with dissent.
I've listened to the term "bubble dweller" for years in reference to more liberal constituencies, but there are no bigger bubble-dwellers in America than these GOP reps in Tennessee. The maps are drawn and the legislature is rigged to where the opposition party is completely irrelevant... not just having majorities, but veto-proof majorities that make dissent all-but-nonexistant.
So, yeah, not shocking that they chose to have a temper tantrum after realizing that there are a bunch of people in places within their borders like Nashville, Memphis or Knoxville who don't just love whatever they do... it's probably been years since these guys have received pushback on anything.