At least they took it seriously. It shows how afraid NASCAR staff and drivers are for Wallace's safety. I'm not into it myself, but from what I'm told he's the only current black driver in NASCAR, and people in the, ahem, "old guard" fanbase have been heaping abuse and threats on him constantly since the Kyle Larson incident and especially since the Confederate flag ban. There were even neo-Confederates flying a plane banner and protesting outside a race right before this all happened.
I don't live near and haven't been to Talladega really so I can't say for sure how it is over there*, but considering how riled up Neo-Confeds all over the state have been over statues getting taken down I think it was probably a necessary action even if he wasn't already being threatened, the only current black driver in NASCAR, and NASCAR didn't have a lot of racist fans. Lot of racists out looking for a target. I'm sure it'll get spinned to hell and back as an overreaction, but whatever, they did the right thing backing Wallace up and investigating it. A fear for his safety was definitely within reason.
In other news, we're apparently getting a physical DSA branch in Northern Alabama? Not really something I expected, but considering that they've been pretty much my only reliable news source for the local protests and seem to be able to organize, their rising popularity isn't too surprising. Socialism in the South is pretty much annihilated from history here but as far as I know of the history of the Alabama branch of the Communist Party is that they were opponents of the KKK and segregation. I can definitely see the appeal in current times, even if the DSA aren't communist. Also, the police thought they were head quartered in a castle (they weren't headquartered in a castle.)
Their secretary did live here at some point though!
*IE: if it's a really racist place or not. NASCAR's rep even in-state leans to yeah probably.
edit: I'm not saying that you MSH, are saying it was unnecessary, just kind of using your post to point out some of the surroundings reasons for this investigation as well.