That's more of a problem with how carbon credits are being regulated. Sure Tesla are being assholes for doing this, but it's a corporation, I don't expect them to be good guys.
But none of that changes the fact that some meathead buying a Cybertruck instead of the equivalent fossil fuel monstrosity is reducing CO2 emissions in a direct way. Spray paint the sign a Tesla corporate HQ, don't damage a vehicle which will only have the result of someone driving a fossil fuel vehicle a little longer while the damage is being fixed.