Nice try, but you implied in your initial dismissal of the plunge in the "30 names" that the rest of stocks in the market weren't also significantly hammered. That is patently false. And of course different sectors will be affectly to different degrees by unexpected changes in specific market fundamentals, in this case, it is primarily interest rates. The issue unaddressed by your "people need to chill the fuck out" is how much will the change in interest rate expectations will affect the economy.
That being said, I agree with San's comment that we are not currently in any danger of 2008 crisis. Not even close. But the Fed has clearly signalled that it believes the economy is overheating and is pressing on the interest rate brake to slow it down. Here's to hoping they don't overdo it. Freight rates are up again with demand for shipments, and most trucking companies are raising driver pay again in less than a year.