Protesting what exactly?
Protesting monster trucks becoming the default go-to vehicle to go run an errand or drive to work. You don't need a "child-destroyer-3000: now Electric!" taking 3 lanes of width, weighing 20 tonnes, and occupying 4 parking spots, to go to your bakery or pick up the kids from school.
What exactly is moral about vandalizing these cars?
If certain vehicles end up costing more to manufacture/protect/repaint than the revenue upon sale, the company will stop manufacturing them. Same idea as deflating SUV wheels which are parked on the street: make lives for SUV drivers inconvenient so people won't want an SUV.
Also this notion that protests are only effective if they're disruptive is a myth. If that was the case then the George Floyd Riots would've led somewhere or the pro Palestinian encampments would've led somewhere or all those climate protesters damaging historical monuments and art would've led somewhere or all those animal rights activists blocking streets would've led somewhere... but they haven't. All they've done is lead people to resent them.
"What did the resistance to Nazi occupation by the Polish people lead to? It didn't work, genocide happened anyway, and all they did is making Nazis resent them".
I'm sure you're aware that people engage in challenges they don't know for certain they can achieve, right?