The simple answer is that it is because they want to kill Israelis.
Other issues such as effectiveness and political implications are secondary to that.
It is a sham.
Passenger cars and pickup trucks do virtually no damage to roads and road beds. The damage is done by heavy trucks and tractor trailers especially overloaded tractor trailers. Light vehicles like hybrids would have no impact.
Oregon is just trying to get in people's pocketbooks.