Making someone a pariah for supporting a fascist - knowingly or unknowingly - only helps to erode the support of the fascist.
If they don’t know what’s going on, when they get their car vandalized they’re going to ask why, then find out why, then sell it, if they have any moral compass.
Their stuff isn’t damaged and can be easily fixed with a minor inconvenience. They’re not being summarily executed. Calm down and let the people work.
Vandalism is an age old rite of protest against fascism. If you don’t want to get your shit vandalized maybe don’t buy shit from fascists.