I knew there was more to the story...
I'm going to go out on a limb here and guess that his EBT card didn't have enough (taxpayer provided) funds on it.
When the clerk told him that *politely* he went ape$hit and assaulted the clerk.
When the dust settles you can bet your sweet bippy that this idiot did NOT just "enter the store with an EBT card and got beaten up".
Probably some kind of Mike Brown situation where he man-handled the clerk.