Businesses need to focus on their business. Make good pizza or grease-burgers or good widgets. Leave your activism at home.
Personally, I would give a business festooned with Truck Fump paraphernalia a very wide berth. Unsurprisingly. That said, I'm not sure how many businesses coating their walls with MAGA I'd be eager to enter. A grease-burger-and-beer place, maybe. A seemingly nice/good ______-food place, probably not. I would view the former as focused on creating a pleasant experience for certain types of people. The latter, I would wonder whether they are distracted from the style(s) of food they are creating.